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A Fedora Digital Object is represented as an atom:feed element and Datastreams are represented as an atom:entry elements.
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| xml | xml |
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<feed xmlns="http://www.w3.org/2005/Atom">
<id>info:fedora/demo:5</id>
<title type="text">Simple Image Demo</title>
<updated>2008-07-02T05:09:42.015Z</updated>
<author><name>fedoraAdmin</name></author>
<category scheme="info:fedora/fedora-system:def/model#state"
term="Active"/>
<category scheme="info:fedora/fedora-system:def/model#createdDate"
term="2008-07-02T05:09:42.015Z"/>
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Object properties are represented using various atom:feed elements. In the abbreviated example above, the object's pid, label, ownerId and lastModifiedDate are represented using the feed's id, title, author, and updated elements respectively. atom:category elements are used to represent object properties such as state and createdDate.
| Code Block | xml | xml | borderStyle | solid
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<entry>
<id>info:fedora/demo:5/DC</id>
<title type="text">DC</title>
<updated>2008-07-02T05:09:43.375Z</updated>
<link href="info:fedora/demo:5/DC/2008-07-02T05:09:43.375Z" rel="alternate"/>
<category scheme="info:fedora/fedora-system:def/model#state"
term="A"/>
<category scheme="info:fedora/fedora-system:def/model#controlGroup"
term="X"/>
<category scheme="info:fedora/fedora-system:def/model#versionable"
term="true"/>
</entry>
<entry xmlns:thr="http://purl.org/syndication/thread/1.0">
<id>info:fedora/demo:5/DC/2008-07-02T05:09:43.375Z</id>
<title type="text">DC1.0</title>
<updated>2008-07-02T05:09:43.375Z</updated>
<thr:in-reply-to ref="info:fedora/demo:5/DC"/>
<category scheme="info:fedora/fedora-system:def/model#formatURI"
term="http://www.openarchives.org/OAI/2.0/oai_dc/"/>
<category scheme="info:fedora/fedora-system:def/model#label"
term="Dublin Core Record for this object"/>
<content type="text/xml">
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/">
<dc:title>Coliseum in Rome</dc:title>
</oai_dc:dc>
</content>
</entry>
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The hierarchy of Datastreams and their Datastream versions is represented via the Atom Threading Extensions. For convenience, a Datastream entry references its latest Datastream version entry with an atom:link element. In the example above, the DC datastream entry refers to its most recent version as follows:
| Code Block | xml | xml | borderStyle | solid
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<link href="info:fedora/demo:5/DC/2008-07-02T05:09:43.375Z" rel="alternate"/> |
Each Datastream version refers to its parent Datastream via a thr:in-reply-to element. In the example above, the entry for the DC Datastream version refers to its parent as follows:
| Code Block | xml | xml | borderStyle | solid
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<thr:in-reply-to ref="info:fedora/demo:5/DC"/> |
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Fedora Atom and Fedora Atom Zip are identified respectively with the following URIs:
info:fedora/fedora-system:ATOM-1.1info:fedora/fedora-system:ATOMZip-1.1
Examples
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