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<td align="left" valign="top"><font face="helvetica, arial, sans-serif"><b>Developing Persistence Architectures Using EclipseLink Database Web Services</b><br />
<b>Release 2.7</b><br />
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<h1 class="sect1"><font face="arial, helvetica, sans-serif" color="#330099">Using Existing EclipseLink ORM and OXM Mappings</font></h1>
<p>A DBWS service may be constructed using pre-existing EclipseLink ORM and OXM maps (both Project classes and Project deployment XML are supported) with identical case-sensitive aliases for Descriptors that are common between the projects.</p>
<div class="example"><a id="TLDBW156" name="TLDBW156"></a><a id="sthref41" name="sthref41"></a>
<p><strong><em><font face="arial, helvetica, sans-serif">Example 2-6 Using an ORM Map</font></em></strong></p>
<pre xml:space="preserve" class="oac_no_warn">
&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;object-persistence version="Eclipse Persistence Services - some version (some build date)" xmlns="http://www.eclipse.org/eclipselink/xsds/persistence" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:eclipselink="http://www.eclipse.org/eclipselink/xsds/persistence"&gt;
&lt;name&gt;SomeORProject&lt;/name&gt;
&lt;class-mapping-descriptors&gt;
&lt;class-mapping-descriptor xsi:type="relational-class-mapping-descriptor"&gt;
&lt;class&gt;some.package.SomeClass&lt;/class&gt;
&lt;alias&gt;SomeAlias&lt;/alias&gt;
...
</pre></div>
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<p><strong><em><font face="arial, helvetica, sans-serif">Example 2-7 Using an OXM Map</font></em></strong></p>
<pre xml:space="preserve" class="oac_no_warn">
&lt;?xml version="1.0" encoding="UTF-8"?&gt;
&lt;object-persistence version="Eclipse Persistence Services - some version (some build date)" xmlns="http://www.eclipse.org/eclipselink/xsds/persistence" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:eclipselink="http://www.eclipse.org/eclipselink/xsds/persistence"&gt;
&lt;name&gt;SomeOXProject&lt;/name&gt;
&lt;class-mapping-descriptor xsi:type="xml-class-mapping-descriptor"&gt;
&lt;class&gt;some.package.SomeClass&lt;/class&gt;
&lt;alias&gt;SomeAlias&lt;/alias&gt;
...
</pre></div>
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<p>When building a DBWS web service in this way (that is, without the <code>DBWSBuilder</code> Utility) be sure to create all the necessary deployment artifacts</p>
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