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Difference between revisions of "EclipseLink/UserGuide/JPA/2.4/schema"

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{{EclipseLink_TLJPA
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#REDIRECT [[EclipseLink/UserGuide/JPA/2.4/toc]]
|Please do not edit this page. Your edits will be overwritten during the next update. Instead, please use Bugzilla to log documentation requests.
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[[Image:Elug_Magnifier.png|Search]][http://www.google.com/cse/home?cx=016171230611334810008:y5kxq4rqd8s&hl=en Search]
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&nbsp;&nbsp;&nbsp;[[Image:Elug_guide_icon.png|Contents]][[EclipseLink/UserGuide/JPA/2.4/toc| Contents]]
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----
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[[EclipseLink/UserGuide/JPA/2.4/q_refresh_cache| Previous ]]<span class="previouslink">[[Image:Elug_previous_icon.png|Previous]]</span>
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[[EclipseLink/UserGuide/JPA/2.4/schema001| Next ]][[Image:Elug_next_icon.png|Next]]
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[[Image:Elug_draft_icon.png|Warning]]Beta Draft: 2012-06-18
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=<span class="secnum">5</span> eclipselink-orm.xml Schema Reference=
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You can use EclipseLink's native metadata XML file, <code>eclipselink-orm.xml</code>, to override mappings defined in the JPA configuration file (<code>orm.xml</code>) and to provide extended ORM features.
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[[Image:Elug_note_icon.png|Note]] '''Note:'''
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Using the <code>eclipselink-orm.xml</code> mapping file enables many EclipseLink advanced features, but it may prevent the persistence unit from being portable to other JPA implementations.
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The <code>eclipselink-orm.xml</code> file defines object-relational mapping metadata for EclipseLink. It is built from the existing <code>orm.xml</code> file which makes it more intuitive, requires minimum configuration, and makes it easy to override.
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For more information, see:
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* Section 12.2 "XML Overriding Rules" in the JPA Specification
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* <code>http://wiki.eclipse.org/EclipseLink/UserGuide/JPA/Basic_JPA_Development/Configuration/JPA/orm.xml</code>
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The schema for EclipseLink is <code>eclipselink_orm_X_X.xsd</code> where X_X is the current EclipseLink version number (such as <code>2_4</code> for '''2.4'''). All EclipseLink schemas are available from <code>http://wiki.eclipse.org/EclipseLink/XSDs</code>.
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[[Image:Eclipselink-logo.gif|150px|EclispeLink]]<br />[[Image:Elug_home_icon.png|EclipseLink logo]] [http://www.eclipse.org/eclipselink/ EclipseLink Home] • [[Image:Elug_pdf.png|PDF]] PDF (coming soon)<br />
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[[Image:Elug_Magnifier.png|Search]][http://www.google.com/cse/home?cx=016171230611334810008:y5kxq4rqd8s&hl=en Search]
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&nbsp;&nbsp;&nbsp;[[Image:Elug_guide_icon.png|Contents]][[EclipseLink/UserGuide/JPA/2.4/toc| Contents]]
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Latest revision as of 12:24, 29 June 2012

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