bundles/org.eclipse.core.expressions/schema/definitions.exsd

<?xml version='1.0' encoding='UTF-8'?>
<!-- Schema file written by PDE -->
<schema targetNamespace="org.eclipse.core.expressions" xmlns="http://www.w3.org/2001/XMLSchema">
<annotation>
      <appinfo>
         <meta.schema plugin="org.eclipse.core.expressions" id="definitions" name="Expression Definitions"/>
      </appinfo>
      <documentation>
         &lt;p&gt;
This extension point allows you to create reusable extensions.  They can then be used in other core expression constructs.
&lt;/p&gt;
&lt;p&gt;
The reference element in a core expression will evaluated the expression definition with the evaluation context that is active for the reference element.
&lt;/p&gt;
      </documentation>
   </annotation>

   <include schemaLocation="expressionLanguage.exsd"/>

   <element name="extension">
      <annotation>
         <appinfo>
            <meta.element />
         </appinfo>
      </annotation>
      <complexType>
         <sequence>
            <element ref="definition" minOccurs="0" maxOccurs="unbounded"/>
         </sequence>
         <attribute name="point" type="string" use="required">
            <annotation>
               <documentation>
                  a fully qualified identifier of the target extension point
               </documentation>
            </annotation>
         </attribute>
         <attribute name="id" type="string">
            <annotation>
               <documentation>
                  an optional identifier of the extension instance
               </documentation>
            </annotation>
         </attribute>
         <attribute name="name" type="string">
            <annotation>
               <documentation>
                  an optional name of the extension instance
               </documentation>
               <appinfo>
                  <meta.attribute translatable="true"/>
               </appinfo>
            </annotation>
         </attribute>
      </complexType>
   </element>

   <element name="definition">
      <annotation>
         <documentation>
            Provides a global definition of an expression to be used with the &amp;lt;reference/&amp;gt; expression element.  This helps to reuse common expressions.
         </documentation>
      </annotation>
      <complexType>
         <choice>
            <element ref="not"/>
            <element ref="and"/>
            <element ref="or"/>
            <element ref="instanceof"/>
            <element ref="test"/>
            <element ref="systemTest"/>
            <element ref="equals"/>
            <element ref="count"/>
            <element ref="with"/>
            <element ref="resolve"/>
            <element ref="adapt"/>
            <element ref="iterate"/>
         </choice>
         <attribute name="id" type="string" use="required">
            <annotation>
               <documentation>
                  A globally unique identifier for the expression definition.
               </documentation>
            </annotation>
         </attribute>
      </complexType>
   </element>

   <annotation>
      <appinfo>
         <meta.section type="since"/>
      </appinfo>
      <documentation>
         3.3
      </documentation>
   </annotation>

   <annotation>
      <appinfo>
         <meta.section type="examples"/>
      </appinfo>
      <documentation>
         You can define and the use core expressions:

&lt;p&gt;
&lt;pre&gt;
&lt;extension point=&quot;org.eclipse.core.expressions.definitions&quot;&gt;
   &lt;definition id=&quot;com.example.parts.activeProblemsView&quot;&gt;
       &lt;with variable=&quot;activePartId&quot;&gt;
          &lt;equals value=&quot;org.eclipse.ui.views.ProblemsView&quot;/&gt;
       &lt;/with&gt;
   &lt;/definition&gt;
   &lt;definition id=&quot;com.example.markers.markerSelection&quot;&gt;
       &lt;iterate&gt;
          &lt;instanceof value=&quot;org.eclipse.core.resources.IMarker&quot;/&gt;
       &lt;/with&gt;
   &lt;/definition&gt;
&lt;/extension&gt;
&lt;/pre&gt;
&lt;/p&gt;
&lt;p&gt;
Then this expression definition can be used when composing other expressions.
&lt;/p&gt;
&lt;p&gt;
&lt;pre&gt;
&lt;enabledWhen&gt;
   &lt;reference definitionId=&quot;com.example.parts.activeProblemsView&quot;&gt;
&lt;/enabledWhen&gt;
&lt;/pre&gt;
&lt;pre&gt;
&lt;visibleWhen&gt;
   &lt;and&gt;
      &lt;reference definitionId=&quot;com.example.parts.activeProblemsView&quot;/&gt;
      &lt;reference definitionId=&quot;com.example.markers.markerSelection&quot;/&gt;
   &lt;/and&gt;
&lt;/visibleWhen&gt;
&lt;/pre&gt;
&lt;/p&gt;
      </documentation>
   </annotation>



   <annotation>
      <appinfo>
         <meta.section type="copyright"/>
      </appinfo>
      <documentation>
         Copyright (c) 2007, 2008 IBM Corporation and others.&lt;br&gt;

This program and the accompanying materials are made available under the terms of the Eclipse Public License 2.0 which accompanies this distribution, and is available at &lt;a href=&quot;https://www.eclipse.org/legal/epl-2.0&quot;&gt;https://www.eclipse.org/legal/epl-v20.html&lt;/a&gt;/

SPDX-License-Identifier: EPL-2.0
      </documentation>
   </annotation>

</schema>