COSMOS SDD Tooling BTG Data Type Comparisons

Preface

This document will describe the way in which the aggregator will work. Upon reading in SDD snippets to merge, the aggregator will start at the top level of either the DeploymentDescriptorType or the PackageDescriptorType. As we start our comparisons, we will look to this chart for what we will compare for each type. We will then traverse down through the sdd as we make our way through the chart, comparing in each type what we have marked with compare in the chart. If this comparison is not a simple type, we will call its type's comparing function, and this will continue until we can determine if the upper level type can be merged, at which point it will be added to our new aggregate sdd.

The work will be broken down into a class for each type, along with a class to read in the sdd snippets and to start the process. The type classes will contain functions for comparing and merging that type.

Common Schema Elements

DescriptorInfoGroup

<xsd:attributeGroup name="DescriptorInfoGroup">
  <xsd:attribute name="schemaVersion" type="xsd:string" fixed="1.0" use="required"/>
  <xsd:attribute name="descriptorID" type="sdd-common:UUIDType" use="required"/>
  <xsd:attribute name="lastModified" type="xsd:dateTime" use="required"/>
  <xsd:attribute name="descriptorLanguageBundle" type="xsd:token" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:attributeGroup>

Type	Element	Attribute	Data Type	Compare?
DescriptorInfoGroup
		schemaVersion	xsd:string	Throw Away
		descriptorID	<UUIDType>	Throw Away
		lastModified	xsd:dateTime	Throw Away
		descriptorLanguageBundle	xsd:token	Merge
		any	namespace="##other"	?

Notes:
DescriptorInfoGroup is always merged.

<DisplayTextType>

<xsd:complexType name="DisplayTextType">
  <xsd:simpleContent>
    <xsd:extension base="xsd:string">
      <xsd:attribute name="translationKey" type="xsd:NCName" use="optional"/>
    </xsd:extension>
  </xsd:simpleContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<DisplayTextType>			Extension Of: xsd:string	Yes
		translationKey	xsd:NCName	Merge

Notes:
DisplayTextType is always merged. When xsd:strings are equal, the merging algorithm must resolve translationKey and choose one of the translations to use.

<VersionType>

<xsd:simpleType name="VersionType">
  <xsd:restriction base="xsd:string"/>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<VersionType>			xsd:string	Yes

<FixIdentityType>

<xsd:complexType name="FixIdentityType">
  <xsd:sequence>
    <xsd:element name="Name" type="xsd:NMTOKEN"/>
    <xsd:element name="Description" type="sdd-common:DisplayTextType"/>
    <xsd:element name="ShortDescription" type="sdd-common:DisplayTextType" minOccurs="0"/>
    <xsd:element name="Symptom" type="sdd-common:DisplayTextType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<FixIdentityType>
	Name		xsd:NMTOKEN	Yes
	Description		<DisplayTextType>	Merge
	ShortDescription		<DisplayTextType>	Merge
	Symptom		<DisplayTextType>	Merge
	any		namespace="##other"	?

<MaintenanceInformationType>

<xsd:complexType name="MaintenanceInformationType">
  <xsd:sequence>
    <xsd:element name="Severity" type="sdd-common:DisplayTextType" minOccurs="0"/>
    <xsd:element name="Category" type="sdd-common:DisplayTextType" minOccurs="0" maxOccurs="unbounded"/>	
    <xsd:element name="Fix" type="sdd-common:FixIdentityType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="Supersedes" type="sdd-common:MaintenanceInformationType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<MaintenanceInformationType>
	Severity		<DisplayTextType>	Merge
	Category		<DisplayTextType>	Merge
	Fix		<FixIdentityType>	Yes
	Supersedes		<MaintenanceInformationType>	Merge
	any		namespace="##other"	?

Notes:
In a MaintenanceInformationType, all Categories apply to all Fixes. When merging two or more instances, it's important to only keep information that is true for all inputs. So, all fixes are kept and as many categories as apply to all fixes are kept.

For example, if MI one contains category FUNCTION and fix A, MI two contains categories FUNCTION, PERFORMANCE and fixes B,C and MI three contains category PERFORMANCE and fix D - the merged MI could contain no categories and fixes A,B,C,D.

Another case is when MI one contains category FUNCTION and fix A and MI two contains categories FUNCTION,PERFORMANCE and fixes B,C. Then the merged MI would contain category FUNCTION and fixes A,B,C.

<BuildInformationType>

<xsd:complexType name="BuildInformationType">
  <xsd:attribute name="buildID" type="xsd:token" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<BuildInformationType>
		buildID	xsd:token	Merge
		any	namespace="##other"	?

Notes:
If a buildID comes from a build system plugin, that buildID should be kept.

<LocationType>

<xsd:complexType name="LocationType">
  <xsd:sequence>
    <xsd:element name="Address" type="sdd-common:DisplayTextType" minOccurs="0"/>
    <xsd:element name="Country" type="sdd-common:DisplayTextType" minOccurs="0"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<LocationType>
	Address		<DisplayTextType>	Merge
	Country		<DisplayTextType>	Merge

<ManufacturerType>

<xsd:complexType name="ManufacturerType">
  <xsd:sequence>
    <xsd:element name="Name" type="sdd-common:DisplayTextType"/>
    <xsd:element name="Location" type="sdd-common:LocationType" minOccurs="0"/>
    <xsd:element name="ContactInformation" type="sdd-common:DisplayTextType" minOccurs="0"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ManufacturerType>
	Name		<DisplayTextType>	Yes
	Location		<LocationType>	Merge
	ContactInformation		<DisplayTextType>	Merge
	any		namespace="##other"	?

<IdentityType>

<xsd:complexType name="IdentityType">
  <xsd:sequence>
    <xsd:element name="Description" type="sdd-common:DisplayTextType" minOccurs="0"/>
    <xsd:element name="ShortDescription" type="sdd-common:DisplayTextType" minOccurs="0"/>
    <xsd:element name="Name" type="sdd-common:DisplayTextType" minOccurs="0" />
    <xsd:element name="Version" type="sdd-common:VersionType" minOccurs="0"/>
    <xsd:element name="MaintenanceInformation" type="sdd-common:MaintenanceInformationType" minOccurs="0"/>
    <xsd:element name="BuildInformation" type="sdd-common:BuildInformationType" minOccurs="0"/>
    <xsd:element name="Manufacturer" type="sdd-common:ManufacturerType" minOccurs="0"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="softwareID" type="xsd:string" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<IdentityType>
		softwareID	xsd:string	Yes
		any	namespace="##other"	?
	Description		<DisplayTextType>	Merge
	ShortDescription		<DisplayTextType>	Merge
	Name		<DisplayTextType>	Merge
	Version		<VersionType>	Merge
	MaintenanceInformation		<MaintenanceInformationType>	Merge
	BuildInformation		<BuildInformationType>	Merge
	Manufacturer		<ManufacturerType>	Merge
	any		namespace="##other"	?

<UUIDType>

<xsd:simpleType name="UUIDType">
  <xsd:restriction base="xsd:hexBinary">
    <xsd:length value="16"/>
  </xsd:restriction>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<UUIDType>			xsd:hexBinary	Yes

Package Descriptor Schema Elements

DigestInfoGroup

<xsd:group name="DigestInfoGroup">
  <xsd:sequence>
    <xsd:element ref="ds:DigestMethod"/>
    <xsd:element ref="ds:DigestValue"/>
  </xsd:sequence>
</xsd:group>

Type	Element	Attribute	Data Type	Compare?
DigestInfoGroup
	DigestMethod		<DigestMethodType>	Yes
	DigestValue		<DigestValueType>	Yes

<SDDContentPurposeType>

<xsd:simpleType name="SDDContentPurposeType">
  <xsd:restriction base="xsd:NCName">
    <xsd:enumeration value="readMe"/>
    <xsd:enumeration value="endUserLicenseAgreement"/>
    <xsd:enumeration value="responseFile"/>
    <xsd:enumeration value="deploymentDescriptor"/>
    <xsd:enumeration value="packageDescriptor"/>	
    <xsd:enumeration value="descriptorLanguageBundle"/>	
    <xsd:enumeration value="content"/>	
  </xsd:restriction>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<SDDContentPurposeType>			xsd:NCName	Yes

<ContentPurposeType>

<xsd:simpleType name="ContentPurposeType">
  <xsd:union memberTypes="sdd-pd:SDDContentPurposeType xsd:NCName"/>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<ContentPurposeType>			Union Of: <SDDContentPurposeType> + xsd:NCName	Yes

<ContentType>

<xsd:complexType name="ContentType">
  <xsd:sequence>
    <xsd:group ref="sdd-pd:DigestInfoGroup" minOccurs="0"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="pathname" type="xsd:anyURI" use="required"/>
  <xsd:attribute name="purpose" type="sdd-pd:ContentPurposeType" default="content" use="optional"/>
  <xsd:attribute name="charEncoding" type="xsd:string" use="optional"/>
  <xsd:attribute name="length" type="xsd:nonNegativeInteger" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ContentType>
	DigestInfoGroup		DigestInfoGroup	No
		id	xsd:ID	Throw Away
		pathname	xsd:anyURI	Yes
		purpose	<ContentPurposeType>	Merge
		charEncoding	xsd:string	No
		length	xsd:nonNegativeInteger	No
		any	namespace="##other"	?

Notes:
If there are two matching pathnames, log a message to the user that the correct file needs to be chosen via a custom rule in order for DigestInfoGroup, charEncoding and length to be valid. The default rule will simply pick one, but it must pick DigestInfoGroup, charEncoding and length together as a set from one of the inputs.

<ContentsType>

<xsd:complexType name="ContentsType">
  <xsd:sequence>
    <xsd:element name="Content" type="sdd-pd:ContentType" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ContentsType>
	Content		<ContentType>	Merge

<SDDPackageTypeType>

<xsd:simpleType name="SDDPackageTypeType">
  <xsd:restriction base="xsd:NCName">
    <xsd:enumeration value="baseInstall"/>
    <xsd:enumeration value="baseUninstall"/>
    <xsd:enumeration value="configuration"/>
    <xsd:enumeration value="maintenance"/>
    <xsd:enumeration value="modification"/>
    <xsd:enumeration value="replacement"/>
    <xsd:enumeration value="localization"/>
  </xsd:restriction>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<SDDPackageTypeType>			xsd:NCName	Yes

<ExtensiblePackageTypeType>

<xsd:simpleType name="ExtensiblePackageTypeType">
  <xsd:union memberTypes="sdd-pd:SDDPackageTypeType xsd:NCName"/>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<ExtensiblePackageTypeType>			Union Of: <SDDPackageTypeType> + xsd:NCName	Yes

<PackageTypeType>

<xsd:simpleType name="PackageTypeType">
  <xsd:list itemType="sdd-pd:ExtensiblePackageTypeType"/>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<PackageTypeType>			List Of: <ExtensiblePackageTypeType>	Merge

<PackageIdentityType>

<xsd:complexType name="PackageIdentityType">
  <xsd:complexContent>
    <xsd:extension base="sdd-common:IdentityType">
      <xsd:attribute name="packageType" type="sdd-pd:PackageTypeType" default="baseInstall" use="optional"/>
      <xsd:attribute name="contentType" type="xsd:QName" use="optional"/>
      <xsd:attribute name="label" type="xsd:NCName" use="optional"/>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<PackageIdentityType>			Extension Of: <IdentityType>	Merge
		packageType	<PackageTypeType>	Merge
		contentType	xsd:QName	Merge
		label	xsd:NCName	Merge

<PackageDescriptorType>

<xsd:complexType name="PackageDescriptorType">
  <xsd:sequence>			
    <xsd:element name="PackageIdentity" type="sdd-pd:PackageIdentityType"/>
    <xsd:element name="Contents" type="sdd-pd:ContentsType"/>
    <xsd:element ref="ds:Signature" minOccurs="0"/>
  </xsd:sequence>
  <xsd:attributeGroup ref="sdd-common:DescriptorInfoGroup"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<PackageDescriptorType>
		DescriptorInfoGroup	DescriptorInfoGroup	Merge
	PackageIdentity		<PackageIdentityType>	Merge
	Contents		<ContentsType>	Merge
	Signature		<SignatureType>	Merge

Deployment Descriptor Schema Elements CL1 and CL2

DescriptionGroup

<xsd:group name="DescriptionGroup">
  <xsd:sequence>
    <xsd:element name="Description" type="sdd-common:DisplayTextType"/>
    <xsd:element name="ShortDescription" type="sdd-common:DisplayTextType" minOccurs="0"/>
  </xsd:sequence>
</xsd:group>

Type	Element	Attribute	Data Type	Compare?
DescriptionGroup
	Description		<DisplayTextType>	Merge
	ShortDescription		<DisplayTextType>	Merge

DisplayElementGroup

<xsd:group name="DisplayElementGroup">
  <xsd:sequence>
    <xsd:element name="DisplayName" type="sdd-common:DisplayTextType" minOccurs="0"/>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
  </xsd:sequence>
</xsd:group>

Type	Element	Attribute	Data Type	Compare?
DisplayElementGroup
	DisplayName		<DisplayTextType>	Merge
	DescriptionGroup		DescriptionGroup	Merge

ResourceConstraintGroup

<xsd:group name="ResourceConstraintGroup">
  <xsd:choice>
    <xsd:element name="CapacityConstraint" type="sdd-dd:CapacityConstraintType"/>
    <xsd:element name="ConsumptionConstraint" type="sdd-dd:ConsumptionConstraintType"/>
    <xsd:element name="PropertyConstraint" type="sdd-dd:PropertyConstraintType"/>
    <xsd:element name="VersionConstraint" type="sdd-dd:VersionConstraintType"/>
    <xsd:element name="UniquenessConstraint" type="sdd-dd:UniquenessConstraintType"/>
    <xsd:element name="RelationshipConstraint" type="sdd-dd:RelationshipConstraintType"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:choice>
</xsd:group>

Type	Element	Attribute	Data Type	Compare?
ResourceConstraintGroup
	CapacityConstraint		<CapacityConstraintType>	No
	ConsumptionConstraint		<ConsumptionConstraintType>	No
	PropertyConstraint		<PropertyConstraintType>	No
	VersionConstraint		<VersionConstraintType>	No
	UniquenessConstraint		<UniquenessConstraintType>	No
	RelationshipConstraint		<RelationshipConstraintType>	No
	any		namespace="##other"	?

Notes:
No rule is needed for this type since it only appears in RequirementResourceConstraint and is never merged.

<VariableExpressionType>

<xsd:simpleType name="VariableExpressionType">
  <xsd:restriction base="xsd:token">
    <xsd:pattern value="([^$]*($[^(])*($\([a-zA-Z_]+[0-9a-zA-Z_]*\))*)*"/>
  </xsd:restriction>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<VariableExpressionType>			xsd:token	Yes

<PropertyType>

<xsd:complexType name="PropertyType">
  <xsd:sequence>
    <xsd:element name="PropertyName" type="xsd:QName"/>
    <xsd:element name="Value" type="sdd-dd:VariableExpressionType"/>
  </xsd:sequence>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<PropertyType>
		any	namespace="##other"	?
	PropertyName		xsd:QName	Yes
	Value		<VariableExpressionType>	Yes

<ResourceTypeNameType>

<xsd:simpleType name="ResourceTypeNameType">
  <xsd:restriction base="xsd:QName"/>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
ResourceTypeNameType			xsd:QName	Yes

<ResourceType>

<xsd:complexType name="ResourceType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
    <xsd:element name="Name" type="sdd-dd:VariableExpressionType" minOccurs="0" />
    <xsd:element name="Property" type="sdd-dd:PropertyType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="HostedResource" type="sdd-dd:ResourceType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="type" type="sdd-dd:ResourceTypeNameType" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ResourceType>
		id	xsd:ID	Throw Away
		type	<ResourceTypeNameType>	Yes
		any	namespace="##other"	?
			DescriptionGroup	Merge
	Name		<VariableExpressionType>	Yes
	Property		<PropertyType>	Yes
	HostedResource		<ResourceType>	Merge
	any		namespace="##other"	?

<TopologyType>

<xsd:complexType name="TopologyType">
  <xsd:sequence>
    <xsd:element name="Resource" type="sdd-dd:ResourceType" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<TopologyType>
	Resource		<ResourceType>	Merge
	any		namespace="##other"	?

<VersionValueType>

<xsd:complexType name="VersionValueType">
  <xsd:sequence>
    <xsd:element name="Version" type="sdd-common:VersionType"/>
    <xsd:element name="FixName" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<VersionValueType>
	Version		<VersionType>	Yes
	FixName		xsd:string	Yes

<MaxVersionType>

<xsd:complexType name="MaxVersionType">
  <xsd:simpleContent>
    <xsd:extension base="sdd-common:VersionType">
      <xsd:attribute name="inclusive" type="xsd:boolean" use="optional" default="false"/>
      <xsd:anyAttribute namespace="##other" processContents="lax"/>	
    </xsd:extension>
  </xsd:simpleContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<MaxVersionType>			Extension Of: <VersionType>	Yes
		inclusive	xsd:boolean	Yes
		any	namespace="##other"	?

Notes:
If the inclusive attribute is not present, it's the same as if it is present with a value of false (since the default is false).

<VersionRangeType>

<xsd:complexType name="VersionRangeType">
  <xsd:sequence>
    <xsd:element name="MinVersion" type="sdd-common:VersionType" minOccurs="0"/>
    <xsd:element name="MaxVersion" type="sdd-dd:MaxVersionType" minOccurs="0"/>
    <xsd:element name="FixName" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<VersionRangeType>
	MinVersion		<VersionType>	Yes
	MaxVersion		<MaxVersionType>	Yes
	FixName		xsd:string	?

<VersionConstraintValueType>

<xsd:complexType name="VersionConstraintValueType">
  <xsd:sequence>
    <xsd:element name="Value" type="sdd-dd:VersionValueType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="Range" type="sdd-dd:VersionRangeType" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<VersionConstraintValueType>
	Value		<VersionValueType>	Merge
	Range		<VersionRangeType>	Merge

<VersionConstraintType>

<xsd:complexType name="VersionConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
    <xsd:element name="Supported" type="sdd-dd:VersionConstraintValueType"/>
    <xsd:element name="Certified" type="sdd-dd:VersionConstraintValueType" minOccurs="0"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<VersionConstraintType>
	DescriptionGroup		DescriptionGroup	Merge
	Supported		<VersionConstraintValueType>	Merge
	Certified		<VersionConstraintValueType>	Merge

<PropertyMatchType>

<xsd:simpleType name="PropertyMatchType">
  <xsd:restriction base="xsd:NCName">
    <xsd:enumeration value="any"/>
    <xsd:enumeration value="all"/>
  </xsd:restriction>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<PropertyMatchType>			xsd:NCName	Yes

<PropertyValueListType>

<xsd:complexType name="PropertyValueListType">
  <xsd:sequence>
    <xsd:element name="Value" type="sdd-dd:VariableExpressionType" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="match" type="sdd-dd:PropertyMatchType" use="optional" default="any"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<PropertyValueListType>
		match	<PropertyMatchType>	Yes
		any	namespace="##other"	?
	Value		<VariableExpressionType>	Yes

Notes:
There is no clean way to merge the list of Values, so if either the Value or match is different for a given PropertyName then the higher level type containing PropertyValueListType should be duplicated.

<ConditionalPropertyConstraintType>

<xsd:complexType name="ConditionalPropertyConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
    <xsd:element name="PropertyName" type="xsd:QName"/>
    <xsd:choice>
      <xsd:element name="Value" type="xsd:string"/>
      <xsd:element name="ListOfValues" type="sdd-dd:PropertyValueListType"/>
    </xsd:choice>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ConditionalPropertyConstraintType>
	DescriptionGroup		DescriptionGroup	Merge
	PropertyName		xsd:QName	Yes
	Value		xsd:string	Yes
	ListOfValues		<PropertyValueListType>	Yes

Notes:

<ConditionalResourceConstraintType>

<xsd:complexType name="ConditionalResourceConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:element name="Name" type="sdd-dd:VariableExpressionType" minOccurs="0" />
    <xsd:element name="VersionConstraint" type="sdd-dd:VersionConstraintValueType" minOccurs="0"/>
    <xsd:element name="PropertyConstraint" type="sdd-dd:ConditionalPropertyConstraintType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="UniquenessConstraint" type="sdd-dd:UniquenessConstraintType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="RelationshipConstraint" type="sdd-dd:RelationshipConstraintType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="resourceRef" type="xsd:IDREF" use="required"/>
  <xsd:attribute name="testValue" type="xsd:boolean" use="optional" default="true"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ConditionalResourceConstraintType>
		id	xsd:ID	Throw Away
		resourceRef	xsd:IDREF	Yes
		testValue	xsd:boolean	Yes
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	Merge
	Name		<VariableExpressionType>	Merge
	VersionConstraint		<VersionConstraintValueType>	Merge
	PropertyConstraint		<ConditionalPropertyConstraintType>	Merge
	UniquenessConstraint		<UniquenessConstraintType>	Merge
	RelationshipConstraint		<RelationshipConstraintType>	Merge
	any		namespace="##other"	?

Notes:
The comparison of resourceRef involves comparing the Resource pointed to, not the reference itself.

When comparing testValue, a missing value is the same as a true value since true is the default.

<AlternativeConditionalType>

<xsd:complexType name="AlternativeConditionalType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:element name="ResourceConstraint" type="sdd-dd:ConditionalResourceConstraintType" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<AlternativeConditionalType>
		id	xsd:ID	Throw Away
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	Merge
	ResourceConstraint		<ConditionalResourceConstraintType>	Merge
	any		namespace="##other"	?

<OperationType>

<xsd:simpleType name="OperationType">
  <xsd:restriction base="xsd:NCName">
    <xsd:enumeration value="configure"/>
    <xsd:enumeration value="install"/>
    <xsd:enumeration value="repair"/>
    <xsd:enumeration value="undo"/>
    <xsd:enumeration value="update"/>
    <xsd:enumeration value="use"/>
    <xsd:enumeration value="uninstall"/>
  </xsd:restriction>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<OperationType>			xsd:NCName	Yes

Notes: The repair enumeration value is only valid for CL2.

<OperationListType>

<xsd:simpleType name="OperationListType">
  <xsd:list itemType="sdd-dd:OperationType"/>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<OperationListType>			List Of:<OperationType>	Yes

<ConditionType>

<xsd:complexType name="ConditionType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:choice>
      <xsd:element name="Alternative" type="sdd-dd:AlternativeConditionalType" maxOccurs="unbounded"/>
      <xsd:sequence>
        <xsd:element name="ResourceConstraint" type="sdd-dd:ConditionalResourceConstraintType" maxOccurs="unbounded"/>
        <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
      </xsd:sequence>
    </xsd:choice>
  </xsd:sequence>
  <xsd:attribute name="operation" type="sdd-dd:OperationListType" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ConditionType>
		operation	<OperationListType>	Yes
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	Merge
	Alternative		<AlternativeConditionalType>	Merge
	ResourceConstraint		<ConditionalResourceConstraintType>	Merge
	any		namespace="##other"	?

Notes:
May need to look at operation here when deciding what kind of ContentUnits to output in the merged descriptor.

<BaseParameterType>

<xsd:complexType name="BaseParameterType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="defaultValue" type="sdd-dd:VariableExpressionType" use="optional"/>
  <xsd:attribute name="sensitive" type="xsd:boolean" use="optional" default="false"/>
  <xsd:attribute name="required" type="xsd:boolean" use="optional" default="true"/>
  <xsd:attribute name="operation" type="sdd-dd:OperationListType" use="optional"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<BaseParameterType>
		id	xsd:ID	Throw Aawy
		defaultValue	<VariableExpressionType>	Yes
		sensitive	xsd:boolean	Yes
		required	xsd:boolean	Yes
		operation	<OperationListType>	Yes
	DisplayElementGroup		DisplayElementGroup	Merge

<BoundaryType>

<xsd:complexType name="BoundaryType">
  <xsd:sequence>
    <xsd:element name="LowerBound" type="sdd-dd:VariableExpressionType" minOccurs="0"/>
    <xsd:element name="UpperBound" type="sdd-dd:VariableExpressionType" minOccurs="0"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<BoundaryType>
	LowerBound		<VariableExpressionType>	Yes
	UpperBound		<VariableExpressionType>	Yes

<IntegerParameterType>

<xsd:complexType name="IntegerParameterType">
  <xsd:complexContent>
    <xsd:extension base="sdd-dd:BaseParameterType">
      <xsd:sequence>
        <xsd:element name="Bounds" type="sdd-dd:BoundaryType" minOccurs="0" maxOccurs="unbounded"/>
      </xsd:sequence>
      <xsd:anyAttribute namespace="##other" processContents="lax"/>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<IntegerParameterType>			Extension Of:<BaseParameterType>
		any	namespace="##other"	?
	Bounds		<BoundaryType>	Merge

<StringCaseType>

<xsd:simpleType name="StringCaseType">
  <xsd:restriction base="xsd:NCName">
    <xsd:enumeration value="lower"/>
    <xsd:enumeration value="upper"/>
    <xsd:enumeration value="mixed"/>
  </xsd:restriction>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<StringCaseType>			xsd:NCName	Yes

<StringParameterType>

<xsd:complexType name="StringParameterType">
  <xsd:complexContent>
    <xsd:extension base="sdd-dd:BaseParameterType">
      <xsd:sequence>
        <xsd:element name="ValidValue" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
      </xsd:sequence>
      <xsd:attribute name="minLength" type="xsd:positiveInteger" use="optional"/>
      <xsd:attribute name="maxLength" type="xsd:positiveInteger" use="optional"/>
      <xsd:attribute name="case" type="sdd-dd:StringCaseType" use="optional" default="mixed"/>
      <xsd:anyAttribute namespace="##other" processContents="lax"/>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<StringParameterType>			Extension Of:<BaseParameterType>
		minLength	xsd:positiveInteger	Merge
		maxLength	xsd:positiveInteger	Merge
		case	<StringCaseType>	Merge
		any	namespace="##other"	?
	ValidValue		xsd:string	Merge

Notes:
A warning should be logged describing the way minLength, maxLength and ValueValue are merged. The default is to combine all ValueValues, take the longest minLength and the shortest maxLength. If minLength ends up longer than maxLength, then throw an error.

For case, if the values don't match then the output becomes mixed. So, upper and lower would merge to mixed, as would upper and mixed or lower and mixed.

<BooleanParameterType>

<xsd:complexType name="BooleanParameterType">
  <xsd:complexContent>
    <xsd:extension base="sdd-dd:BaseParameterType">
      <xsd:anyAttribute namespace="##other" processContents="lax"/>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<BooleanParameterType>			Extension Of:<BaseParameterType>
		any	namespace="##other"	?

<URIParameterType>

<xsd:complexType name="URIParameterType">
  <xsd:complexContent>
    <xsd:extension base="sdd-dd:BaseParameterType">
      <xsd:anyAttribute namespace="##other" processContents="lax"/>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<URIParameterType>			Extension Of:<BaseParameterType>
		any	namespace="##other"	?

<ParametersType>

<xsd:complexType name="ParametersType">
  <xsd:choice maxOccurs="unbounded">
    <xsd:element name="IntegerParameter" type="sdd-dd:IntegerParameterType"/>
    <xsd:element name="StringParameter" type="sdd-dd:StringParameterType"/>
    <xsd:element name="BooleanParameter" type="sdd-dd:BooleanParameterType"/>
    <xsd:element name="URIParameter" type="sdd-dd:URIParameterType"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:choice>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ParametersType>
	IntegerParameter		<IntegerParameterType>	Merge
	StringParameter		<StringParameterType>	Merge
	BooleanParameter		<BooleanParameterType>	Merge
	URIParameter		<URIParameterType>	Merge
	any		namespace="##other"	?

<BaseVariableType>

<xsd:complexType name="BaseVariableType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="sensitive" type="xsd:boolean" use="optional" default="false"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<BaseVariableType>
		id	xsd:ID	Throw Away
		sensitive	xsd:boolean	Yes
	DescriptionGroup		DescriptionGroup	Merge

<ResourcePropertyType>

<xsd:complexType name="ResourcePropertyType">
  <xsd:complexContent>
    <xsd:extension base="sdd-dd:BaseVariableType">
      <xsd:attribute name="resourceRef" type="xsd:IDREF" use="required"/>
      <xsd:attribute name="propertyName" type="xsd:QName" use="required"/>
      <xsd:anyAttribute namespace="##other" processContents="lax"/>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ResourcePropertyType>			Extension Of:<BaseVariableType>
		resourceRef	xsd:IDREF	Yes
		propertyName	xsd:QName	Yes
		any	namespace="##other"	?

Notes:
Compare the Resource pointed to by the resourceRef, not the reference itself.

<ConditionalDerivedVariableExpressionType>

<xsd:complexType name="ConditionalDerivedVariableExpressionType">
  <xsd:sequence>
    <xsd:element name="Condition" type="sdd-dd:ConditionType"/>
    <xsd:element name="Expression" type="sdd-dd:VariableExpressionType"/>
  </xsd:sequence>
  <xsd:attribute name="priority" type="xsd:positiveInteger" use="optional" default="1"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ConditionalDerivedVariableExpressionType>
		priority	xsd:positiveInteger	Merge
	Condition		<ConditionType>	Yes
	Expression		<VariableExpressionType>	Yes

Notes:

Merging Algorithm

Walk down the left list, checking if each item is equal to anything in the right list. If an item is equal to something in the right list, replace the left item with the item from the right and everything in the right list above that item (excluding items that have already been copied to the left list). Continue until reaching the end of the left list. If any un-copied items remain in the right list, append them to the end of the left list.

There are two special cases that have to be handled slightly differently. The first case is when an item in one list is equal to more than one item in the other list. Merging should take place as normal, but all priorities should be removed from the final list. This case is an error in the input so a warning should be logged. The second case is when an item in the left list is equal to an item in the right list that has already been copied to the left list. Normal merging should continue and the priorities should be removed from the final list.

Here's what the lists above would look like after merging:

<DerivedVariableType>

<xsd:complexType name="DerivedVariableType">
  <xsd:complexContent>
    <xsd:extension base="sdd-dd:BaseVariableType">
      <xsd:choice>
        <xsd:element name="Expression" type="sdd-dd:VariableExpressionType"/>
        <xsd:element name="ConditionalExpression" type="sdd-dd:ConditionalDerivedVariableExpressionType" maxOccurs="unbounded"/>
      </xsd:choice>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<DerivedVariableType>			Extension Of:<BaseVariableType>
	Expression		<VariableExpressionType>	Yes
	ConditionalExpression		<ConditionalDerivedVariableExpressionType>	Merge

<VariablesType>

<xsd:complexType name="VariablesType">
  <xsd:choice maxOccurs="unbounded">
    <xsd:element name="Parameters" type="sdd-dd:ParametersType"/>
    <xsd:element name="ResourceProperty" type="sdd-dd:ResourcePropertyType"/>
    <xsd:element name="DerivedVariable" type="sdd-dd:DerivedVariableType"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:choice>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<VariablesType>
	Parameters		<ParametersType>	Merge
	ResourceProperty		<ResourcePropertyType>	Merge
	DerivedVariable		<DerivedVariableType>	Merge
	any		namespace="##other"	?

<RequiredBaseConstraintType>

<xsd:complexType name="RequiredBaseConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:element name="Name" type="sdd-dd:VariableExpressionType" minOccurs="0" />
    <xsd:element name="VersionConstraint" type="sdd-dd:VersionConstraintType" minOccurs="0"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="resourceRef" type="xsd:IDREF" use="required"/>
  <xsd:attribute name="testValue" type="xsd:boolean" use="optional" default="true"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<RequiredBaseConstraintType>
		id	xsd:ID	Throw Away
		resourceRef	xsd:IDREF	Yes
		testValue	xsd:boolean	Yes
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	Merge
	Name		<VariableExpressionType>	Merge
	VersionConstraint		<VersionConstraintType>	Yes
	any		namespace="##other"	?

Notes:
Compare the Resources pointed to by the resourceRef, not the references themselves.

<AlternativeRequiredBaseConstraintType>

<xsd:complexType name="AlternativeRequiredBaseConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:element name="ResourceConstraint" type="sdd-dd:RequiredBaseConstraintType" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="priority" type="xsd:positiveInteger" use="optional" default="1"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<AlternativeRequiredBaseConstraintType>
		id	xsd:ID	Throw Away
		priority	xsd:positiveInteger	Merge
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	Merge
	ResourceConstraint		<RequiredBaseConstraintType>	Yes
	any		namespace="##other"	?

Notes:
See notes in <ConditionalDerivedVariableExpressionType>

<RequiredBaseType>

<xsd:complexType name="RequiredBaseType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:choice>
      <xsd:element name="Alternative" type="sdd-dd:AlternativeRequiredBaseConstraintType" maxOccurs="unbounded"/>
      <xsd:sequence>
        <xsd:element name="ResourceConstraint" type="sdd-dd:RequiredBaseConstraintType" maxOccurs="unbounded"/>
        <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
      </xsd:sequence>
    </xsd:choice>
  </xsd:sequence>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<RequiredBaseType>
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	Merge
	Alternative		<AlternativeRequiredBaseConstraintType>	Merge
	ResourceConstraint		<RequiredBaseConstraintType>	Merge
	any		namespace="##other"	?

<CapacityValueType>

<xsd:complexType name="CapacityValueType">
  <xsd:sequence>
    <xsd:element name="Minimum" type="sdd-dd:VariableExpressionType" minOccurs="0"/>
    <xsd:element name="Maximum" type="sdd-dd:VariableExpressionType" minOccurs="0"/>
    <xsd:element name="MinimumRecommended" type="sdd-dd:VariableExpressionType" minOccurs="0"/>
    <xsd:element name="MaximumRecommended" type="sdd-dd:VariableExpressionType" minOccurs="0"/>
  </xsd:sequence>
  <xsd:attribute name="unit" type="xsd:string" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<CapacityValueType>
		unit	xsd:string	Merge
		any	namespace="##other"	?
	Minimum		<VariableExpressionType>	Merge
	Maximum		<VariableExpressionType>	Merge
	MinimumRecommended		<VariableExpressionType>	Merge
	MaximumRecommended		<VariableExpressionType>	Merge

Notes:
A merge can take place in the case where the units are the same or the units are different and the Aggregator can understand and covert between the units (like MB and KB). If the units are both different and not known the the Aggregator then the CapacityValueType is marked not equal and merging takes place farther up the tree.

When merging, use the highest Minimum and highest Maximum.

<CapacityConstraintType>

<xsd:complexType name="CapacityConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
    <xsd:element name="PropertyName" type="xsd:QName"/>
    <xsd:element name="Value" type="sdd-dd:CapacityValueType"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<CapacityConstraintType>
	DescriptionGroup		DescriptionGroup	No
	PropertyName		xsd:QName	No
	Value		<CapacityValueType>	No

Notes:
No rule is needed for this type since it only appears in ResourceConstraintGroup and is never merged.

<ConsumptionConstraintValueType>

<xsd:complexType name="ConsumptionConstraintValueType">
  <xsd:simpleContent>
    <xsd:extension base="sdd-dd:VariableExpressionType">
      <xsd:attribute name="unit" type="xsd:string" use="optional"/>
      <xsd:anyAttribute namespace="##other" processContents="lax"/>
    </xsd:extension>
  </xsd:simpleContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ConsumptionConstraintValueType>			Extension Of: <VariableExpressionType>
		unit	xsd:string	No
		any	namespace="##other"	?

Notes:
No rule is needed for this type since it only appears in ConsumptionConstrainType and is never merged.

<ConsumptionConstraintType>

<xsd:complexType name="ConsumptionConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
    <xsd:element name="PropertyName" type="xsd:QName"/>
    <xsd:element name="Value" type="sdd-dd:ConsumptionConstraintValueType"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ConsumptionConstraintType>
	DescriptionGroup		DescriptionGroup	No
	PropertyName		xsd:QName	No
	Value		<ConsumptionConstraintValueType>	No

Notes:
No rule is needed for this type since it only appears in ResourceConstraintGroup and is never merged.

<PropertyConstraintType>

<xsd:complexType name="PropertyConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
    <xsd:element name="PropertyName" type="xsd:QName"/>
    <xsd:choice>
      <xsd:element name="Value" type="sdd-dd:VariableExpressionType"/>
      <xsd:element name="ListOfValues" type="sdd-dd:PropertyValueListType"/>
    </xsd:choice>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<PropertyConstraintType>
	DescriptionGroup		DescriptionGroup	No
	PropertyName		xsd:QName	No
	Value		<VariableExpressionType>	No
	ListOfValues		<PropertyValueListType>	No

Notes:
No rule is needed for this type since it only appears in ResourceConstraintGroup and is never merged.

<RequirementResourceConstraintType>

<xsd:complexType name="RequirementResourceConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:element name="Name" type="sdd-dd:VariableExpressionType" minOccurs="0" />
    <xsd:group ref="sdd-dd:ResourceConstraintGroup" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="resourceRef" type="xsd:IDREF" use="required"/>
  <xsd:attribute name="testValue" type="xsd:boolean" use="optional" default="true"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<RequirementResourceConstraintType>
		id	xsd:ID	Throw Away
		resourceRef	xsd:IDREF	No
		testValue	xsd:boolean	No
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	No
	Name		<VariableExpressionType>	No
	ResourceConstraintGroup		ResourceConstraintGroup	No

Notes:
RequirementResourceConstraintType is never merged. Instead, they will either be left alone inside their original RequirementType or moved inside an AlternativeRequirementType, depending on which RequirementType rule has been chosen. No rules is needed for this type.

<AlternativeRequirementType>

<xsd:complexType name="AlternativeRequirementType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:choice minOccurs="0" maxOccurs="unbounded">
      <xsd:element name="ResourceConstraint" type="sdd-dd:RequirementResourceConstraintType"/>
      <xsd:element name="Dependency" type="sdd-dd:InternalDependencyType"/>
      <xsd:any namespace="##other" processContents="lax"/>
    </xsd:choice>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="priority" type="xsd:positiveInteger" use="optional" default="1"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<AlternativeRequirementType>
		id	xsd:ID	Throw Away
		priority	xsd:positiveInteger	Merge
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	Merge
	ResourceConstraint		<RequirementResourceConstraintType>	Yes
	Dependency		<InternalDependencyType>	Yes
	any		namespace="##other"	?

Notes:
See notes in <ConditionalDerivedVariableExpressionType> for merging priorities.

<RequirementType>

<xsd:complexType name="RequirementType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:choice>
      <xsd:element name="Alternative" type="sdd-dd:AlternativeRequirementType" maxOccurs="unbounded"/>
      <xsd:choice minOccurs="0" maxOccurs="unbounded">
        <xsd:element name="ResourceConstraint" type="sdd-dd:RequirementResourceConstraintType"/>
        <xsd:element name="Dependency" type="sdd-dd:InternalDependencyType"/>
        <xsd:any namespace="##other" processContents="lax"/>
      </xsd:choice>
    </xsd:choice>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="operation" type="sdd-dd:OperationListType" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<RequirementType>
		id	xsd:ID	Throw Away
		operation	<OperationListType>	Yes
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	Merge
	Alternative		<AlternativeRequirementType>	Merge
	ResourceConstraint		<RequirementResourceConstraintType>	Yes
	Dependency		<InternalDependencyType>	Yes
	any		namespace="##other"	?

Notes:
There should be two rules created for this type so that the user can choose which one to include in their rule set. The first rule will merge RequirementTypes that have the same operation and create Alternatives for any ResourceConstraints. The second rule will never merge RequirementTypes and instead combine them all together in a big list under RequirementsType.

<RequirementsType>

<xsd:complexType name="RequirementsType">
  <xsd:sequence>
    <xsd:element name="Requirement" type="sdd-dd:RequirementType" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<RequirementsType>
	Requirement		<RequirementType>	Merge

<LanguageType>

<xsd:complexType name="LanguageType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
  </xsd:sequence>
  <xsd:attribute name="type" type="xsd:language" use="required"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<LanguageType>
		type	xsd:language	Yes
	DisplayElementGroup		DisplayElementGroup	Merge

<LanguagesType>

<xsd:complexType name="LanguagesType">
  <xsd:sequence>
    <xsd:element name="Language" type="sdd-dd:LanguageType" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>	

Type	Element	Attribute	Data Type	Compare?
<LanguagesType>
	Language		<LanguageType>	Merge

<SDDCompletionTypeNamesType>

<xsd:simpleType name="SDDCompletionTypeNamesType">
  <xsd:restriction base="xsd:NCName">
    <xsd:enumeration value="restartRequiredImmediately"/>
    <xsd:enumeration value="restartRequiredBeforeUse"/>
    <xsd:enumeration value="restartOccurs"/>
    <xsd:enumeration value="logoffRequired"/>
  </xsd:restriction>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<SDDCompletionTypeNamesType>			xsd:NCName	Yes

<DescriptionGroup>

<xsd:simpleType name="CompletionTypeNamesType">
  <xsd:union memberTypes="sdd-dd:SDDCompletionTypeNamesType xsd:NCName" />
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<DescriptionGroup>			Union Of: <SDDCompletionTypeNamesType> + xsd:NCName	Yes

<CompletionType>

<xsd:complexType name="CompletionType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="type" type="sdd-dd:CompletionTypeNamesType" use="required"/>
  <xsd:attribute name="resourceRef" type="xsd:IDREF" use="required"/>
  <xsd:attribute name="operation" type="sdd-dd:OperationListType" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<CompletionType>
		type	<CompletionTypeNamesType>	Yes
		resourceRef	xsd:IDREF	Yes
		operation	<OperationListType>	Yes
		any	namespace="##other"	?
	DisplayElementGroup		<DisplayElementGroup>	Merge
	Condition		<ConditionType>	Merge
	any		namespace="##other"	?

Notes:
Compare the Resources pointed to by resourceRef, not the references themselves.

<ResultingPropertyType>

<xsd:complexType name="ResultingPropertyType">
  <xsd:sequence>
    <xsd:element name="PropertyName" type="xsd:string"/>
    <xsd:element name="Value" type="sdd-dd:VariableExpressionType"/>
  </xsd:sequence>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ResultingPropertyType>
		any	namespace="##other"	?
	PropertyName		xsd:string	Yes
	Value		<VariableExpressionType>	Merge

<ResultingResourceType>

<xsd:complexType name="ResultingResourceType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:element name="Name" type="sdd-dd:VariableExpressionType" minOccurs="0" />
    <xsd:element name="Version" type="sdd-common:VersionType" minOccurs="0"/>
    <xsd:element name="FixName" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="Property" type="sdd-dd:ResultingPropertyType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="Relationship" type="sdd-dd:RelationshipType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="resourceRef" type="xsd:IDREF" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ResultingResourceType>
		resourceRef	xsd:IDREF	Yes
		any	namespace="##other"	?
	DescriptionGroup		DescriptionGroup	Merge
	Condition		<ConditionType>	Yes
	Name		<VariableExpressionType>	Merge
	Version		<VersionType>	Yes
	FixName		xsd:string	Merge
	Property		<ResultingPropertyType>	Merge
	Relationship		<RelationshipType>	Merge
	any		namespace="##other"	?

Notes:
Compare the Resources pointed to by the resourceRefs, not the references themselves.

<ResultingChangeType>

<xsd:complexType name="ResultingChangeType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:element name="Name" type="sdd-dd:VariableExpressionType" minOccurs="0" />
    <xsd:element name="Property" type="sdd-dd:ResultingPropertyType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="Relationship" type="sdd-dd:RelationshipType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="resourceRef" type="xsd:IDREF" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ResultingChangeType>
		resourceRef	xsd:IDREF	Yes
		any	namespace="##other"	?
	DescriptionGroup		DescriptionGroup	Merge
	Condition		<ConditionType>	Yes
	Name		<VariableExpressionType>	Merge
	Property		<ResultingPropertyType>	Merge
	Relationship		<RelationshipType>	Merge
	any		namespace="##other"	?

Notes:
Compare the Resources pointed to by the resourceRefs, not the references themselves.

<ArgumentType>

<xsd:complexType name="ArgumentType">
  <xsd:attribute name="name" type="sdd-dd:VariableExpressionType" use="required"/>
  <xsd:attribute name="value" type="sdd-dd:VariableExpressionType" use="optional"/>
  <xsd:attribute name="required" type="xsd:boolean" use="optional" default="true"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ArgumentType>
		name	<VariableExpressionType>	Yes
		value	<VariableExpressionType>	Marge
		required	xsd:boolean	Merge
		any	namespace="##other"	?

Notes:
Merge required by performing a logical OR.

<ArgumentListType>

<xsd:complexType name="ArgumentListType">
  <xsd:sequence>
    <xsd:element name="Argument" type="sdd-dd:ArgumentType" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ArgumentListType>
	Argument		<ArgumentType>	Merge

<OutputVariableType>

<xsd:complexType name="OutputVariableType">
  <xsd:complexContent>
    <xsd:extension base="sdd-dd:BaseVariableType">
      <xsd:attribute name="outputParameterName" type="xsd:NCName" use="optional"/>
      <xsd:anyAttribute namespace="##other" processContents="lax"/>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<OutputVariableType>			Extension Of:<BaseVariableType>
		outputParameterName	xsd:NCName	Yes
		any	namespace="##other"	?

<OutputVariableListType>

<xsd:complexType name="OutputVariableListType">
  <xsd:sequence>
    <xsd:element name="OutputVariable" type="sdd-dd:OutputVariableType" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<OutputVariableListType>
	OutputVariable		<OutputVariableType>	Merge

<SubstitutionType>

<xsd:complexType name="SubstitutionType">
  <xsd:sequence>
    <xsd:element name="Pattern" type="xsd:string"/>
    <xsd:element name="Value" type="sdd-dd:VariableExpressionType"/>
  </xsd:sequence>
  <xsd:attribute name="limit" type="xsd:positiveInteger" use="optional"/>
  <xsd:attribute name="required" type="xsd:boolean" use="optional" default="true"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<SubstitutionType>
		limit	xsd:positiveInteger	Merge
		required	xsd:boolean	Merge
		any	namespace="##other"	?
	Pattern		xsd:string	Yes
	Value		<VariableExpressionType>	Yes

Notes:
Merge required by using a logical AND.

<ArtifactTypeNameType>

<xsd:simpleType name="ArtifactTypeNameType">
  <xsd:restriction base="xsd:QName"/>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<ArtifactTypeNameType>			xsd:QName	Yes

<AdditionalContentType>

<xsd:complexType name="AdditionalContentType">
  <xsd:sequence>
    <xsd:element name="Substitution" type="sdd-dd:SubstitutionType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="contentRef" type="xsd:token" use="required"/>
  <xsd:attribute name="type" type="sdd-dd:ArtifactTypeNameType" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<AdditionalContentType>
		contentRef	xsd:token	Yes
		type	<ArtifactTypeNameType>	Merge
		any	namespace="##other"	?
	Substitution		<SubstitutionType>	Merge
	any		namespace="##other"	?

Notes:
Compare the Content pointed to by contentRef, not the references themselves.

When merging, type and contentRef must stay together as a pair. So, whichever contentRef is kept, the associated type must be kept.

<ArtifactType>

<xsd:complexType name="ArtifactType">
  <xsd:sequence>
    <xsd:element name="Arguments" type="sdd-dd:ArgumentListType" minOccurs="0"/>
    <xsd:element name="OutputVariables" type="sdd-dd:OutputVariableListType" minOccurs="0"/>
    <xsd:element name="AdditionalContent" type="sdd-dd:AdditionalContentType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="contentRef" type="xsd:token" use="optional"/>
  <xsd:attribute name="resourceRef" type="xsd:IDREF" use="optional"/>
  <xsd:attribute name="type" type="sdd-dd:ArtifactTypeNameType" use="optional"/>
  <xsd:attribute name="weight" type="xsd:positiveInteger" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ArtifactType>
		contentRef	xsd:token	Yes
		resourceRef	xsd:IDREF	Yes
		type	<ArtifactTypeNameType>	Merge
		weight	xsd:positiveInteger	Merge
		any	namespace="##other"	?
	Arguments		<ArgumentListType>	Merge
	OutputVariables		<OutputVariableListType>	Merge
	AdditionalContent		<AdditionalContentType>	Merge
	any		namespace="##other"	?

Notes:
If two weights are different (which means two inputs think the same Artifact takes two different times to install), then log a warning and do not include weight in the ouput.

When merging, type must go along as a pair with the contentRef or resourceRef that it's associated with.

When comparing conrentRef or resourceRef, compare the element pointed to instead of the references themselves.

<InstallationArtifactsType>

<xsd:complexType name="InstallationArtifactsType">
  <xsd:sequence>
    <xsd:element name="InstallArtifact" type="sdd-dd:ArtifactType" minOccurs="0"/>
    <xsd:element name="UpdateArtifact" type="sdd-dd:ArtifactType" minOccurs="0"/>
    <xsd:element name="UndoArtifact" type="sdd-dd:ArtifactType" minOccurs="0"/>
    <xsd:element name="UninstallArtifact" type="sdd-dd:ArtifactType" minOccurs="0"/>
    <xsd:element name="RepairArtifact" type="sdd-dd:ArtifactType" minOccurs="0"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<InstallationArtifactsType>
	InstallArtifact		<ArtifactType>	Merge
	UpdateArtifact		<ArtifactType>	Merge
	UndoArtifact		<ArtifactType>	Merge
	UninstallArtifact		<ArtifactType>	Merge
	RepairArtifact		<ArtifactType>	Merge
	any		namespace="##other"	?

Notes: The RepairArtifact sub-element is only valid for CL2.

<InstallableUnitType>

<xsd:complexType name="InstallableUnitType">
  <xsd:sequence>
    <xsd:element name="Identity" type="sdd-common:IdentityType" minOccurs="0"/>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:element name="Variables" type="sdd-dd:VariablesType" minOccurs="0"/>
    <xsd:element name="RequiredBase" type="sdd-dd:RequiredBaseType" minOccurs="0"/>
    <xsd:element name="Requirements" type="sdd-dd:RequirementsType" minOccurs="0"/>
    <xsd:element name="Languages" type="sdd-dd:LanguagesType" minOccurs="0"/>
    <xsd:element name="Completion" type="sdd-dd:CompletionType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="ResultingResource" type="sdd-dd:ResultingResourceType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="ResultingChange" type="sdd-dd:ResultingChangeType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="Artifacts" type="sdd-dd:InstallationArtifactsType"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="targetResourceRef" type="xsd:IDREF" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<InstallableUnitType>
		id	xsd:ID	Throw Away
		targetResourceRef	xsd:IDREF	Yes
		any	namespace="##other"	?
	Identity		<IdentityType>	Merge
	Condition		<ConditionType>	Merge
	Variables		<VariablesType>	Merge
	RequiredBase		<RequiredBaseType>	Merge
	Requirements		<RequirementsType>	Merge
	Languages		<LanguagesType>	Merge
	Completion		<CompletionType>	Merge
	ResultingResource		<ResultingResourceType>	Yes
	ResultingChange		<ResultingChangeType>	Yes
	Artifacts		<InstallationArtifactsType>	No
	any		namespace="##other"	?

Notes:
When comparing targetResourceRefs, compare the TargetResources pointed to instead of the targetResourceRefs themselves.

Artifacts, ResultingResource and ResultingChange must all stay together as a set. If ResultingResource and ResultingChange from two InstallableUnits match but the Artifacts are different, pick one Artifacts and log a warning.

<ConfigurationArtifactsType>

<xsd:complexType name="ConfigurationArtifactsType">
  <xsd:sequence>
    <xsd:element name="ConfigArtifact" type="sdd-dd:ArtifactType" minOccurs="0"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ConfigurationArtifactsType>
	ConfigArtifact		<ArtifactType>	Yes
	any		namespace="##other"	?

<ConfigurationUnitType>

<xsd:complexType name="ConfigurationUnitType">
  <xsd:sequence>
    <xsd:element name="Identity" type="sdd-common:IdentityType" minOccurs="0"/>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:element name="Variables" type="sdd-dd:VariablesType" minOccurs="0"/>
    <xsd:element name="Requirements" type="sdd-dd:RequirementsType" minOccurs="0"/>
    <xsd:element name="Completion" type="sdd-dd:CompletionType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="ResultingChange" type="sdd-dd:ResultingChangeType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="Artifacts" type="sdd-dd:ConfigurationArtifactsType"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="targetResourceRef" type="xsd:IDREF" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ConfigurationUnitType>
		id	xsd:ID	Throw Away
		targetResourceRef	xsd:IDREF	Yes
		any	namespace="##other"	?
	Identity		<IdentityType>	Merge
	Condition		<ConditionType>	Merge
	Variables		<VariablesType>	Merge
	Requirements		<RequirementsType>	Merge
	Completion		<CompletionType>	Merge
	ResultingChange		<ResultingChangeType>	Yes
	Artifacts		<ConfigurationArtifactsType>	No
	any		namespace="##other"	?

Notes:
When comparing targetResourceRefs, compare the TargetResources pointed to instead of the tergerResourceRefs themselves.

<LocalizationUnitType>

<xsd:complexType name="LocalizationUnitType">
  <xsd:sequence>
    <xsd:element name="Identity" type="sdd-common:IdentityType" minOccurs="0"/>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:element name="Variables" type="sdd-dd:VariablesType" minOccurs="0"/>
    <xsd:element name="RequiredBase" type="sdd-dd:RequiredBaseType" minOccurs="0"/>
    <xsd:element name="Requirements" type="sdd-dd:RequirementsType" minOccurs="0"/>
    <xsd:element name="Languages" type="sdd-dd:LanguagesType" minOccurs="0"/>
    <xsd:element name="Completion" type="sdd-dd:CompletionType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="LocalizationBase" type="sdd-dd:RequiredBaseType" minOccurs="0"/>
    <xsd:element name="ResultingResource" type="sdd-dd:ResultingResourceType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="Artifacts" type="sdd-dd:InstallationArtifactsType"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="targetResourceRef" type="xsd:IDREF" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<LocalizationUnitType>
		id	xsd:ID	Throw Away
		targetResourceRef	xsd:IDREF	Yes
		any	namespace="##other"	?
	Identity		<IdentityType>	Merge
	Condition		<ConditionType>	Merge
	Variables		<VariablesType>	Merge
	RequiredBase		<RequiredBaseType>	Merge
	Requirements		<RequirementsType>	Merge
	Languages		<LanguagesType>	Merge
	Completion		<CompletionType>	Merge
	LocalizationBase		<RequiredBaseType>	Merge
	ResultingResource		<ResultingResourceType>	Yes
	Artifacts		<InstallationArtifactsType>	No
	any		namespace="##other"	?

Notes:
When comparing targetResourceRefs, compare the TargetResources pointed to instead of the tergerResourceRefs themselves.

<LanguageSetType>

<xsd:complexType name="LanguageSetType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:element name="Language" type="sdd-dd:LanguageType" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<LanguageSetType>
	DisplayElementGroup		DisplayElementGroup	Merge
	Language		<LanguageType>	Merge

<DeploymentDescriptorType>

<xsd:complexType name="DeploymentDescriptorType">
  <xsd:sequence>
    <xsd:element name="Topology" type="sdd-dd:TopologyType"/>
    <xsd:choice>
      <xsd:choice>
        <xsd:element name="InstallableUnit" type="sdd-dd:InstallableUnitType"/>
        <xsd:element name="ConfigurationUnit" type="sdd-dd:ConfigurationUnitType"/>
        <xsd:element name="LocalizationUnit" type="sdd-dd:LocalizationUnitType"/>
      </xsd:choice>
      <xsd:sequence maxOccurs="unbounded">
        <xsd:element name="CompositeInstallable" type="sdd-dd:CompositeInstallableType"/>
      </xsd:sequence>
    </xsd:choice>
    <xsd:element name="Requisites" type="sdd-dd:RequisitesType" minOccurs="0"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attributeGroup ref="sdd-common:DescriptorInfoGroup"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<DeploymentDescriptorType>
		DescriptorInfoGroup	DescriptorInfoGroup	Merge
	Topology		<TopologyType>	Merge
	InstallableUnit		<InstallableUnitType>	Merge
	ConfigurationUnit		<ConfigurationUnitType>	Merge
	LocalizationUnit		<LocalizationUnitType>	Merge
	CompositeInstallable		<CompositeInstallableType>	Merge
	Requisites		<RequisitesType>	Merge
	any		namespace="##other"	?

Deployment Descriptor Schema Elements CL2 specific

<BaseContentType>

<xsd:complexType name="BaseContentType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:ContentListGroup"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<BaseContentType>
	ContentListGroup		ContentListGroup	Merge

<CompositeInstallableType>

<xsd:complexType name="CompositeInstallableType">
  <xsd:sequence>
    <xsd:element name="Identity" type="sdd-common:IdentityType" minOccurs="0"/>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:element name="Variables" type="sdd-dd:VariablesType" minOccurs="0"/>
    <xsd:element name="RequiredBase" type="sdd-dd:RequiredBaseType" minOccurs="0"/>
    <xsd:element name="Requirements" type="sdd-dd:RequirementsType" minOccurs="0"/>
    <xsd:element name="Languages" type="sdd-dd:LanguageSelectionsType" minOccurs="0"/>
    <xsd:element name="ResultingResource" type="sdd-dd:ResultingResourceType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="ResultingChange" type="sdd-dd:ResultingChangeType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="BaseContent" type="sdd-dd:BaseContentType" minOccurs="0"/>
    <xsd:element name="SelectableContent" type="sdd-dd:SelectableContentType" minOccurs="0"/>
    <xsd:element name="LocalizationContent" type="sdd-dd:LocalizationContentType" minOccurs="0"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="operation" type="sdd-dd:OperationType" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<CompositeInstallableType>
		id	xsd:ID	Throw Away
		operation	<OperationType>	Yes
		any	namespace="##other"	?
	Identity		<IdentityType>	Merge
	Condition		<ConditionType>	Merge
	Variables		<VariablesType>	Merge
	RequiredBase		<RequiredBaseType>	Merge
	Requirements		<RequirementsType>	Merge
	Languages		<LanguageSelectionsType>	Merge
	Completion		<CompletionType>	Merge
	ResultingResource		<ResultingResourceType>	Yes
	ResultingChange		<ResultingChangeType>	Yes
	BaseContent		<BaseContentType>	Merge
	SelectableContent		<SelectableContentType>	Merge
	LocalizationContent		<LocalizationContentType>	Merge
	any		namespace="##other"	?

<CompositeLocalizationUnitType>

<xsd:complexType name="CompositeLocalizationUnitType">
  <xsd:sequence>
    <xsd:element name="Identity" type="sdd-common:IdentityType" minOccurs="0"/>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:element name="Variables" type="sdd-dd:VariablesType" minOccurs="0"/>
    <xsd:element name="RequiredBase" type="sdd-dd:RequiredBaseType" minOccurs="0"/>
    <xsd:element name="Requirements" type="sdd-dd:RequirementsType" minOccurs="0"/>
    <xsd:element name="Languages" type="sdd-dd:LanguagesType" minOccurs="0"/>
    <xsd:element name="Completion" type="sdd-dd:CompletionType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="LocalizationBase" type="sdd-dd:RequiredBaseType" minOccurs="0"/>
    <xsd:element name="ResultingResource" type="sdd-dd:ResultingResourceType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:choice maxOccurs="unbounded">
      <xsd:element name="LocalizationUnit" type="sdd-dd:LocalizationUnitType"/>
      <xsd:element name="ContainedLocalizationPackage" type="sdd-dd:ReferencedPackageType"/>
      <xsd:element name="CompositeLocalizationUnit" type="sdd-dd:CompositeLocalizationUnitType"/>
    </xsd:choice>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<CompositeLocalizationUnitType>
		id	xsd:ID	Throw Away
		any	namespace="##other"	?
	Identity		<IdentityType>	Merge
	Condition		<ConditionType>	Merge
	Variables		<VariablesType>	Merge
	RequiredBase		<RequiredBaseType>	Merge
	Requirements		<RequirementsType>	Merge
	Languages		<LanguagesType>	Merge
	Completion		<CompletionType>	Merge
	LocalizationBase		<RequiredBaseType>	Merge
	ResultingResource		<ResultingResourceType>	Yes
	LocalizationUnit		<LocalizationUnitType>	Merge
	ContainedLocalizationPackage		<ReferencedPackageType>	Merge
	CompositeLocalizationUnit		<CompositeLocalizationUnitType>	Merge
	any		namespace="##other"	?

<CompositeUnitType>

<xsd:complexType name="CompositeUnitType">
  <xsd:sequence>
    <xsd:element name="Identity" type="sdd-common:IdentityType" minOccurs="0"/>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:element name="Variables" type="sdd-dd:VariablesType" minOccurs="0"/>
    <xsd:element name="Requirements" type="sdd-dd:RequirementsType" minOccurs="0"/>
    <xsd:group ref="sdd-dd:ContentListGroup"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<CompositeUnitType>
		id	xsd:ID	Throw Away
		any	namespace="##other"	?
	Identity		<IdentityType>	Merge
	Condition		<ConditionType>	Merge
	Variables		<VariablesType>	Merge
	Requirements		<RequirementsType>	Merge
	ContentListGroup		ContentListGroup	Merge

<ConstrainedResourceType>

<xsd:complexType name="ConstrainedResourceType">
  <xsd:attribute name="resourceRef" type="xsd:IDREF" use="required"/>
  <xsd:attribute name="constraintType" type="sdd-dd:MultiplicityConstraintType" use="optional" default="same"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ConstrainedResourceType>
		resourceRef	xsd:IDREF	Yes
		constraintType	<MultiplicityConstraintType>	Yes
		any	namespace="##other"	?

Notes:
When comparing resourceRefs, compare the Resources pointed to instead of the references themselves.

<MultiplicityType>

<xsd:complexType name="MultiplicityType">
  <xsd:sequence>
    <xsd:element name="ConstrainedFeature" type="sdd-dd:FeatureReferenceType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="ConstrainedResource" type="sdd-dd:ConstrainedResourceType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="multiplesAllowed" type="xsd:boolean" fixed="true" use="required"/>
  <xsd:attribute name="minSelections" type="xsd:positiveInteger" default="1" use="optional"/>
  <xsd:attribute name="maxSelections" type="xsd:positiveInteger" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<MultiplicityType>
		multiplesAllowed	xsd:boolean	Merge
		minSelections	xsd:positiveInteger	Merge
		maxSelections	xsd:positiveInteger	Merge
		any	namespace="##other"	?
	ConstrainedFeature		<FeatureReferenceType>	Yes
	ConstrainedResource		<ConstrainedResourceType>	Yes
	any		namespace="##other"	?

Notes:
If minSelections and maxSelections are different in the two inputs, keep the lowest min and lowest max. If that makes the max smaller than the min, set them both to the smaller of the values and log a warning.

<ContentElementReferenceType>

<xsd:complexType name="ContentElementReferenceType">
  <xsd:attribute name="contentElementRef" type="xsd:IDREF" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ContentElementReferenceType>
		contentElementRef	xsd:IDREF	Yes
		any	namespace="##other"	?

<PackageFeatureReferenceType>

<xsd:complexType name="PackageFeatureReferenceType">
  <xsd:attribute name="contentElementRef" type="xsd:IDREF" use="required"/>
  <xsd:attribute name="packageFeatureRef" type="xsd:NCName" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<PackageFeatureReferenceType>
		contentElementRef	xsd:IDREF	Yes
		packageFeatureRef	xsd:NCName	Yes
		any	namespace="##other"	?

<NestedFeatureType>

<xsd:complexType name="NestedFeatureType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:element name="Multiplicity" type="sdd-dd:MultiplicityType" minOccurs="0"/>
    <xsd:element name="Languages" type="sdd-dd:LanguageSelectionsType" minOccurs="0"/>
    <xsd:choice maxOccurs="unbounded">
      <xsd:element name="NestedFeature" type="sdd-dd:NestedFeatureType"/>
      <xsd:element name="ContentElement" type="sdd-dd:ContentElementReferenceType"/>
      <xsd:element name="PackageFeatureReference" type="sdd-dd:PackageFeatureReferenceType"/>
      <xsd:element name="RequiredFeature" type="sdd-dd:FeatureReferenceType"/>
      <xsd:element name="Variable" type="sdd-dd:DerivedVariableType"/>
    </xsd:choice>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="addOn" type="xsd:boolean" use="optional" default="false"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<NestedFeatureType>
		id	xsd:ID	Throw Away
		addOn	xsd:boolean	Merge
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	Merge
	Condition		<ConditionType>	Merge
	Multiplicity		<MultiplicityType>	Merge
	Languages		<LanguageSelectionsType>	Merge
	NestedFeature		<NestedFeatureType>	Merge
	ContentElement		<ContentElementReferenceType>	Yes
	PackageFeatureReference		<PackageFeatureReferenceType>	Merge
	RequiredFeature		<FeatureReferenceType>	Merge
	Variable		<DerivedVariableType>	Merge
	any		namespace="##other"	?

Notes:
Merge addOn by performing a logical AND.

If two Conditions can't be merged (meaning they have different operations), then throw an error.

If two Miltiplicitys can't be merged (meaning they have different ConstrainedFeatures or ConstrainedResources), then throw an error.

<FeatureType>

<xsd:complexType name="FeatureType">
  <xsd:complexContent>
    <xsd:extension base="sdd-dd:NestedFeatureType">
      <xsd:attribute name="required" type="xsd:boolean" use="optional" default="false"/>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<FeatureType>			Extension Of:<NestedFeatureType>
		required	xsd:boolean	Merge

Notes:
Merge required by performing a logical OR.

<MultiSelectType>

<xsd:complexType name="MultiSelectType">
  <xsd:sequence>
    <xsd:element name="Feature" type="sdd-dd:FeatureReferenceType" minOccurs="2" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="minSelections" type="xsd:nonNegativeInteger" use="optional" default="0"/>
  <xsd:attribute name="maxSelections" type="xsd:positiveInteger" use="optional"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<MultiSelectType>
		minSelections	xsd:nonNegativeInteger	Merge
		maxSelections	xsd:positiveInteger	Merge
	Feature		<FeatureReferenceType>	Merge

Notes:
When merging minSelections and maxSelections, use the lowest min and highest max.

<FeaturesType>

<xsd:complexType name="FeaturesType">
  <xsd:sequence>
    <xsd:element name="Feature" type="sdd-dd:FeatureType" maxOccurs="unbounded"/>
    <xsd:element name="MultiSelect" type="sdd-dd:MultiSelectType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<FeaturesType>
	Feature		<FeatureType>	Merge
	MultiSelect		<MultiSelectType>	Merge
	any		namespace="##other"	?

<SelectableContentType>

<xsd:complexType name="SelectableContentType">
  <xsd:sequence>	
    <xsd:element name="Groups" type="sdd-dd:GroupsType" minOccurs="0"/>
    <xsd:element name="Features" type="sdd-dd:FeaturesType" minOccurs="0"/>
    <xsd:group ref="sdd-dd:ContentListGroup"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<SelectableContentType>
	Groups		<GroupsType>	Merge
	Features		<FeaturesType>	Merge
	ContentListGroup		ContentListGroup	Merge

<LocalizationContentType>

<xsd:complexType name="LocalizationContentType">
  <xsd:sequence>
    <xsd:choice maxOccurs="unbounded">
      <xsd:element name="LocalizationUnit" type="sdd-dd:LocalizationUnitType"/>
      <xsd:element name="ContainedLocalizationPackage" type="sdd-dd:ReferencedPackageType"/>
      <xsd:element name="CompositeLocalizationUnit" type="sdd-dd:CompositeLocalizationUnitType"/>
    </xsd:choice>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<LocalizationContentType>
	LocalizationUnit		<LocalizationUnitType>	Merge
	ContainedLocalizationPackage		<ReferencedPackageType>	Merge
	CompositeLocalizationUnit		<CompositeLocalizationUnitType>	Merge

<RequisitesType>

<xsd:complexType name="RequisitesType">
  <xsd:sequence>
    <xsd:element name="ReferencedPackage" type="sdd-dd:ReferencedPackageType" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<RequisitesType>
	ReferencedPackage		<ReferencedPackageType>	Merge

ContentListGroup

<xsd:group name="ContentListGroup">
  <xsd:sequence>
    <xsd:choice minOccurs="0" maxOccurs="unbounded">
      <xsd:element name="InstallableUnit" type="sdd-dd:InstallableUnitType"/>
      <xsd:element name="ConfigurationUnit" type="sdd-dd:ConfigurationUnitType"/>
      <xsd:element name="CompositeUnit" type="sdd-dd:CompositeUnitType"/>
      <xsd:element name="ContainedPackage" type="sdd-dd:ReferencedPackageType"/>
      <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
    </xsd:choice>
  </xsd:sequence>
</xsd:group>

Type	Element	Attribute	Data Type	Compare?
ContentListGroup
	InstallableUnit		<InstallableUnitType>	Merge
	ConfigurationUnit		<ConfigurationUnitType>	Merge
	CompositeUnit		<CompositeUnitType>	Merge
	RequiredBase		<RequiredBaseType>	Merge
	ContainedPackage		<ReferencedPackageType>	Merge
	any		namespace="##other"	?

<ContentSelectionFeatureType>

<xsd:complexType name="ContentSelectionFeatureType">
  <xsd:simpleContent>
    <xsd:extension base="xsd:token">
      <xsd:attribute name="selections" type="sdd-dd:VariableExpressionType" use="optional"/>
    </xsd:extension>
  </xsd:simpleContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ContentSelectionFeatureType>			Extension Of:xsd:token
		selections	<VariableExpressionType>	Merge

Notes:
If selections in the two inputs are different, do not include selections at all in the output. After merging, another pass needs to be made to verify that selections is still within the min and max Selections of the Feature's MultiplicityType. If selections is out of range, modify it so that it is within the range (set to minimum if too small, set to maximum if too big).

<RequiredContentSelectionType>

<xsd:complexType name="RequiredContentSelectionType">
  <xsd:sequence>
    <xsd:element name="Group" type="xsd:token" minOccurs="0"/>
    <xsd:element name="Feature" type="sdd-dd:ContentSelectionFeatureType" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<RequiredContentSelectionType>
	Group		xsd:token	Yes
	Feature		<ContentSelectionFeatureType>	Merge

<ResourceMapType>

<xsd:complexType name="ResourceMapType">
  <xsd:attribute name="resourceRef" type="xsd:IDREF" use="required"/>
  <xsd:attribute name="foreignId" type="xsd:NCName" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ResourceMapType>
		resourceRef	xsd:IDREF	Yes
		foreignId	xsd:NCName	Yes
		any	namespace="##other"	?

Notes:
Compare the Resources pointed to by the resourceRef and foreignId instead of the references themselves.

<ResultingResourceMapType>

<xsd:complexType name="ResultingResourceMapType">
  <xsd:complexContent>
    <xsd:extension base="sdd-dd:ResourceMapType">
      <xsd:sequence>
        <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
        <xsd:element name="Name" type="sdd-dd:VariableExpressionType" minOccurs="0"/>
        <xsd:element name="Version" type="sdd-common:VersionType" minOccurs="0"/>
        <xsd:element name="FixName" type="xsd:string" minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element name="Property" type="sdd-dd:ResultingPropertyType" minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element name="Relationship" type="sdd-dd:RelationshipType" minOccurs="0" maxOccurs="unbounded"/>
        <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
      </xsd:sequence>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ResultingResourceMapType>			Extension Of:<ResourceMapType>
	Condition		<ConditionType>	Yes
	Name		<VariableExpressionType>	Merge
	Version		<VersionType>	Yes
	FixName		xsd:string	Merge
	Property		<ResultingPropertyType>	Merge
	Relationship		<RelationshipType>	Merge
	any		namespace="##other"	?

<ResultingChangeMapType>

<xsd:complexType name="ResultingChangeMapType">
  <xsd:complexContent>
    <xsd:extension base="sdd-dd:ResourceMapType">
      <xsd:sequence>
        <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
        <xsd:element name="Name" type="sdd-dd:VariableExpressionType" minOccurs="0"/>
        <xsd:element name="Property" type="sdd-dd:ResultingPropertyType" minOccurs="0" maxOccurs="unbounded"/>
        <xsd:element name="Relationship" type="sdd-dd:RelationshipType" minOccurs="0" maxOccurs="unbounded"/>
        <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
      </xsd:sequence>
    </xsd:extension>
  </xsd:complexContent>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ResultingChangeMapType>			Extension Of:<ResourceMapType>
	Condition		<ConditionType>	Yes
	Name		<VariableExpressionType>	Merge
	Property		<ResultingPropertyType>	Merge
	Relationship		<RelationshipType>	Merge
	any		namespace="##other"	?

<ReferencedPackageType>

<xsd:complexType name="ReferencedPackageType">
  <xsd:sequence>
    <xsd:element name="Condition" type="sdd-dd:ConditionType" minOccurs="0"/>
    <xsd:element name="RequiredContentSelection" type="sdd-dd:RequiredContentSelectionType" minOccurs="0"/>
    <xsd:element name="Arguments" type="sdd-dd:ArgumentListType" minOccurs="0"/>
    <xsd:element name="OutputVariables" type="sdd-dd:OutputVariableListType" minOccurs="0"/>
    <xsd:element name="Requirements" type="sdd-dd:RequirementsType" minOccurs="0"/>
    <xsd:element name="ResultingResourceMap" type="sdd-dd:ResultingResourceMapType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="ResultingChangeMap" type="sdd-dd:ResultingChangeMapType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="RequiredResourceMap" type="sdd-dd:ResourceMapType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:element name="Languages" type="sdd-dd:LanguagesType" minOccurs="0"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="contentRef" type="xsd:token" use="required"/>
  <xsd:attribute name="weight" type="xsd:positiveInteger" use="optional"/>
  <xsd:attribute name="operation" type="sdd-dd:OperationType" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<ReferencedPackageType>
		id	xsd:ID	Throw Away
		contentRef	xsd:token	Yes
		weight	xsd:positiveInteger	Merge
		operation	<OperationType>	Yes
		any	namespace="##other"	?
	Condition		<ConditionType>	Yes
	RequiredContentSelection		<RequiredContentSelectionType>	Merge
	Arguments		<ArgumentListType>	Merge
	OutputVariables		<OutputVariableListType>	Merge
	Requirements		<RequirementsType>	Merge
	ResultingResourceMap		<ResultingResourceMapType>	Merge
	ResultingChangeMap		<ResultingChangeMapType>	Merge
	RequiredResourceMap		<ResourceMapType>	Merge
	Languages		<LanguagesType>	Merge
	any		namespace="##other"	?

Notes:
If two inputs have different weights, don't include weight in the output.

When comparing contentRefs, compare the Contents pointed to instead of the references themselves.

<FeatureReferenceType>

<xsd:complexType name="FeatureReferenceType">
  <xsd:attribute name="featureRef" type="xsd:IDREF" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<FeatureReferenceType>
		featureRef	xsd:IDREF	Yes
		any	namespace="##other"	?

Notes:
When comparing featureReferences, compare the Features pointed to instead of the references themselves.

<GroupType>

<xsd:complexType name="GroupType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DisplayElementGroup" minOccurs="0"/>
    <xsd:element name="SelectedFeature" type="sdd-dd:FeatureReferenceType" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="id" type="xsd:ID" use="required"/>
  <xsd:attribute name="default" type="xsd:boolean" use="optional" default="false"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<GroupType>
		id	xsd:ID	Throw Away
		default	xsd:boolean	Merge
		any	namespace="##other"	?
	DisplayElementGroup		DisplayElementGroup	Merge
	SelectedFeature		<FeatureReferenceType>	Yes
	any		namespace="##other"	?

Notes:
Merge default by performing a logical OR. The resulting SDD can only have one instance of default=true, so a check for multiple must be performed. If more than one true is found, all instances should be set to false.

<GroupsType>

<xsd:complexType name="GroupsType">
  <xsd:sequence>
    <xsd:element name="Group" type="sdd-dd:GroupType" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<GroupsType>
	Group		<GroupType>	Merge

<MultiplicityConstraintType>

<xsd:simpleType name="MultiplicityConstraintType">
  <xsd:restriction base="xsd:NCName">
    <xsd:enumeration value="same"/>
    <xsd:enumeration value="unique"/>
  </xsd:restriction>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<MultiplicityConstraintType>			xsd:NCName	Yes

<DependencyType>

<xsd:simpleType name="DependencyType">
  <xsd:restriction base="xsd:NCName">
    <xsd:enumeration value="pre-req"/>
    <xsd:enumeration value="co-req"/>
    <xsd:enumeration value="ex-req"/>
  </xsd:restriction>
</xsd:simpleType>

Type	Element	Attribute	Data Type	Compare?
<DependencyType>			xsd:NCName	Yes{Center}

<InternalDependencyType>

<xsd:complexType name="InternalDependencyType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
  </xsd:sequence>
  <xsd:attribute name="type" type="sdd-dd:DependencyType" use="optional" default="pre-req"/>
  <xsd:attribute name="contentElementRef" type="xsd:IDREF" use="required"/>
  <xsd:attribute name="contentElementRefOperation" type="sdd-dd:OperationListType" use="optional"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<InternalDependencyType>
		type	<DependencyType>	Yes
		contentElementRef	xsd:IDREF	Yes
		contentElementRefOperation	<OperationListType>	Yes
		any	namespace="##other"	?
	DescriptionGroup		DescriptionGroup	Merge

Notes:
Compare the ContentElement pointed to by the contentElementRef, not the reference itself.

<LanguageSelectionsType>

<xsd:complexType name="LanguageSelectionsType">
  <xsd:sequence>
    <xsd:element name="Mandatory" type="sdd-dd:LanguagesType" minOccurs="0"/>
    <xsd:element name="Optional" type="sdd-dd:OptionalLanguagesType" minOccurs="0" />
  </xsd:sequence>
</xsd:complexType>	

Type	Element	Attribute	Data Type	Compare?
<LanguageSelectionsType>
	Mandatory		<LanguagesType>	Merge
	Optional		<OptionalLanguagesType>	Merge

<OptionalLanguagesType>

<xsd:complexType name="OptionalLanguagesType">
  <xsd:choice maxOccurs="unbounded">
    <xsd:element name="Language" type="sdd-dd:LanguageType"/>
    <xsd:element name="LanguageSet" type="sdd-dd:LanguageSetType"/>
  </xsd:choice>
</xsd:complexType>	

Type	Element	Attribute	Data Type	Compare?
<OptionalLanguagesType>
	Language		<LanguageType>	Merge
	LanguageSet		<LanguageSetType>	Merge

<RelationshipConstraintType>

<xsd:complexType name="RelationshipConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
    <xsd:element name="Property" type="sdd-dd:PropertyType" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="relatedResourceRef" type="xsd:IDREF" use="optional"/>
  <xsd:attribute name="type" type="xsd:QName" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<RelationshipConstraintType>
		relatedResourceRef	xsd:IDREF	Yes
		type	xsd:QName	Yes
		any	namespace="##other"	?
	DescriptionGroup		DescriptionGroup	Merge
	Property		<PropertyType>	Yes

Notes:
The comparison of relatedResourceRef involves comparing the Resource pointed to, not the reference itself.

<RelationshipType>

<xsd:complexType name="RelationshipType">
  <xsd:sequence>
    <xsd:element name="Property" type="sdd-dd:PropertyType" minOccurs="0" maxOccurs="unbounded"/>
    <xsd:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
  <xsd:attribute name="relatedResourceRef" type="xsd:IDREF" use="required"/>
  <xsd:attribute name="type" type="xsd:QName" use="required"/>
  <xsd:anyAttribute namespace="##other" processContents="lax"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<RelationshipType>
		relatedResourceRef	xsd:IDREF	Yes
		type	xsd:QName	Yes
		any	namespace="##other"	?
	Property		<PropertyType>	Yes
	any		namespace="##other"	?

Notes:
Compare the Resources pointed to by the relatedResourceRef, not the references themselves.

<UniquenessConstraintType>

<xsd:complexType name="UniquenessConstraintType">
  <xsd:sequence>
    <xsd:group ref="sdd-dd:DescriptionGroup" minOccurs="0"/>
  </xsd:sequence>
  <xsd:attribute name="distinctResourceRef" type="xsd:IDREF" use="required"/>
</xsd:complexType>

Type	Element	Attribute	Data Type	Compare?
<UniquenessConstraintType>
		distinctResourceRef	xsd:IDREF	Yes
	DescriptionGroup		DescriptionGroup	Merge

Notes:
The comparison of distinceResourceRef involves comparing the Resource pointed to, not the reference itself.

Notes on Lineage Calculation

When calculating the lineage of an SDD element, it is necessary to include the element's ancestors and the children of those ancestors. When determining which children to include and how far down each child's tree to go, the basic logic is: Follow the Yeses. That means that only children whose Compare column is Yes in the above tables should be included in the lineage calculation, and only the Yes children of those children should be included, and so on. If a particular child has all Merge or No children, then walking down that branch should stop there.