...
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|---|
<dsCompositeModel
xmlns="info:fedora/fedora-system:def/dsCompositeModel#">
<dsTypeModel ID="DC">
<form MIME="text/xml"/>
</dsTypeModel>
<dsTypeModel ID="ORIGIN">
<form MIME="text/xml"/>
</dsTypeModel>
</dsCompositeModel>
|
Optional datastreams
First, we will ammend the schema to support the property "optional" to datastream declarations. The JIRA issue for this is http://fedora-commons.org/jira/browse/FCREPO-531
The semantic meaning of optional is:
1. The datastream can exist in the substribing objects but does not have to
2. If the datastream exist, it must adhere to the specification in the content model
This will allow you to express optional datastreams like this
| Code Block |
|---|
<dsCompositeModel
xmlns="info:fedora/fedora-system:def/dsCompositeModel#">
<dsTypeModel ID="DC">
<form MIME="text/xml"/>
</dsTypeModel>
<dsTypeModel ID="ORIGIN" optional="true">
<form MIME="text/xml"/>
</dsTypeModel>
</dsCompositeModel>
|
To allow this, the schema is now
| Code Block |
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<xsd:schema
targetNamespace="info:fedora/fedora-system:def/dsCompositeModel#"
xmlns="info:fedora/fedora-system:def/dsCompositeModel#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified"
attributeFormDefault="unqualified">
<xsd:element name="dsCompositeModel">
<xsd:complexType>
<xsd:sequence>
<xsd:element minOccurs="0" maxOccurs="unbounded" ref="dsTypeModel"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="dsTypeModel">
<xsd:complexType>
<xsd:sequence>
<xsd:element minOccurs="0" maxOccurs="unbounded" ref="form"/>
</xsd:sequence>
<xsd:attribute name="ID" use="required" type="xsd:NCName"/>
<xsd:attribute name="optional" use="optional" type="xsd:boolean" default="false"/>
</xsd:complexType>
</xsd:element>
<xsd:element name="form">
<xsd:complexType>
<xsd:attribute name="FORMAT_URI" use="optional" type="xsd:anyURI"/>
<xsd:attribute name="MIME" use="optional"/>
</xsd:complexType>
</xsd:element>
</xsd:schema>
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Allowing extensions in DS-COMPOSITE
...
| Code Block |
|---|
<xsd:schema
targetNamespace="info:fedora/fedora-system:def/dsCompositeModel#"
xmlns="info:fedora/fedora-system:def/dsCompositeModel#"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified"
attributeFormDefault="unqualified">
<xsd:element name="dsCompositeModel">
<xsd:complexType>
<xsd:sequence>
<xsd:element minOccurs="0" maxOccurs="unbounded" ref="dsTypeModel"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="dsTypeModel">
<xsd:complexType>
<xsd:sequence>
<xsd:element minOccurs="0" maxOccurs="unbounded" ref="form"/>
<xsd:element minOccurs="0" maxOccurs="unbounded" ref="extension"/>
</xsd:sequence>
<xsd:attribute name="ID" use="required"/>
<xsd:attribute name="optional" use="optional" type="xsd:boolean" default="false"/>
</xsd:complexType>
</xsd:element>
<xsd:element name="extension">
<xsd:complexType>
<xsd:sequence>
<xsd:any namespace="##any" processContents="skip" minOccurs="0" maxOccurs="unbounded"/>
</xsd:sequence>
<xsd:attribute name="name" use="required"/>
</xsd:complexType>
</xsd:element>
<xsd:element name="form">
<xsd:complexType>
<xsd:attribute name="FORMAT_URI" use="optional" type="xsd:anyURI"/>
<xsd:attribute name="MIME" use="optional"/>
</xsd:complexType>
</xsd:element>
<xsd:element name="reference">
<xsd:complexType>
<xsd:attribute name="type"/>
<xsd:attribute name="value"/>
</xsd:complexType>
</xsd:element>
</xsd:schema>
|
...