<?xml version='1.0' encoding='UTF-8'?>
<!-- Schema file written by PDE -->
<schema targetNamespace="org.eclipse.core.runtime">
<annotation>
      <appInfo>
         <meta.schema plugin="org.eclipse.core.runtime" id="contentTypes" name="Content Types"/>
      </appInfo>
      <documentation>
         The content types extension point allows plug-ins to contribute to the platform content type catalog. There are two forms of contributions: &lt;cite&gt;content types&lt;/cite&gt; and &lt;cite&gt;file associations&lt;/cite&gt;.
&lt;ul&gt;
&lt;li&gt;
a content type represents a file format and its naming conventions. Content types can be defined from scratch, or can inherit from existing ones, specializing them. Also, a content type can be made into an alias for another content type (see the &lt;code&gt;alias-for&lt;/code&gt; attribute). When this feature is used:
  &lt;ul&gt;&lt;li&gt;if the target is absent, the alias content type is processed 
  as a normal content type;&lt;/li&gt;
  &lt;li&gt;if the target is present, all references to the alias type are automatically
  transformed into references to the target type, and the alias type cannot be 
  accessed nor is exposed through the API.&lt;/li&gt;&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;
a file association extends an existing content type by associating new file names and/or extensions to it&lt;/li&gt;
&lt;/ul&gt;
      </documentation>
   </annotation>

   <element name="extension">
      <complexType>
         <sequence>
            <element ref="content-type" minOccurs="0" maxOccurs="unbounded"/>
            <element ref="file-association" 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="content-type">
      <complexType>
         <sequence>
            <element ref="describer" minOccurs="0" maxOccurs="1"/>
            <element ref="property" minOccurs="0" maxOccurs="unbounded"/>
         </sequence>
         <attribute name="id" type="string" use="required">
            <annotation>
               <documentation>
                  the identifier for this content type (simple id token, unique for content types within the extension namespace). The token cannot contain dot (.) or whitespace
               </documentation>
            </annotation>
         </attribute>
         <attribute name="base-type" type="string">
            <annotation>
               <documentation>
                  the fully qualified identifier of this content type&apos;s base type. This content type will inherit its base type&apos;s file associations, content describer and default charset, unless they are redefined
               </documentation>
            </annotation>
         </attribute>
         <attribute name="name" type="string" use="required">
            <annotation>
               <documentation>
                  the human-readable name of this content type
               </documentation>
               <appInfo>
                  <meta.attribute translatable="true"/>
               </appInfo>
            </annotation>
         </attribute>
         <attribute name="file-extensions" type="string">
            <annotation>
               <documentation>
                  a comma-separated list of file extensions to be associated with this content type
               </documentation>
            </annotation>
         </attribute>
         <attribute name="file-names" type="string">
            <annotation>
               <documentation>
                  a comma-separated list of file names to be associated with this content type
               </documentation>
            </annotation>
         </attribute>
         <attribute name="priority" use="default" value="normal">
            <annotation>
               <documentation>
                  the priority for this content type. Priorities are used to solve conflicts (when two content types are associated to the same file name/extension)
               </documentation>
            </annotation>
            <simpleType>
               <restriction base="string">
                  <enumeration value="low">
                  </enumeration>
                  <enumeration value="normal">
                  </enumeration>
                  <enumeration value="high">
                  </enumeration>
               </restriction>
            </simpleType>
         </attribute>
         <attribute name="default-charset" type="string">
            <annotation>
               <documentation>
                  the default charset for this content type, or an empty string, if this content type should not have a default charset even if the parent has one. This is a convenience attribute, equivalent to specifying:
&lt;pre&gt;
  &lt;content-type&gt;
    &lt;property name=&quot;org.eclipse.core.runtime.charset&quot; default=&quot;charset-name&quot;/&gt;
  &lt;/content-type&gt;
&lt;/pre&gt;
               </documentation>
            </annotation>
         </attribute>
         <attribute name="describer" type="string">
            <annotation>
               <documentation>
                  the fully qualified name of a class that implements &lt;samp&gt;org.eclipse.core.runtime.content.IContentDescriber&lt;/samp&gt; or &lt;samp&gt;org.eclipse.core.runtime.content.ITextContentDescriber&lt;/samp&gt;, or an empty string, if this content type should not have a describer even if the parent has one
               </documentation>
               <appInfo>
                  <meta.attribute kind="java"/>
               </appInfo>
            </annotation>
         </attribute>
         <attribute name="alias-for" type="string">
            <annotation>
               <documentation>
                  the fully qualified identifier of the content type this content type is an alias for
               </documentation>
            </annotation>
         </attribute>
      </complexType>
   </element>

   <element name="describer">
      <annotation>
         <documentation>
            If the describer attribute is used in the content-type element, this element is ignored.
         </documentation>
      </annotation>
      <complexType>
         <sequence>
            <element ref="parameter" minOccurs="0" maxOccurs="unbounded"/>
         </sequence>
         <attribute name="class" type="string" use="required">
            <annotation>
               <documentation>
                  the fully qualified name of a class that implements &lt;samp&gt;org.eclipse.core.runtime.content.IContentDescriber&lt;/samp&gt; or &lt;samp&gt;org.eclipse.core.runtime.content.ITextContentDescriber&lt;/samp&gt;, or an empty string, if this content type should not have a describer even if the parent has one
               </documentation>
               <appInfo>
                  <meta.attribute kind="java" basedOn="org.eclipse.core.runtime.content.IContentDescriber"/>
               </appInfo>
            </annotation>
         </attribute>
         <attribute name="plugin" type="string">
            <annotation>
               <documentation>
                  the id for the plug-in providing the describer class
               </documentation>
            </annotation>
         </attribute>
      </complexType>
   </element>

   <element name="file-association">
      <complexType>
         <attribute name="content-type" type="string" use="required">
            <annotation>
               <documentation>
                  the fully qualified identifier for the content type this file association contributes to
               </documentation>
            </annotation>
         </attribute>
         <attribute name="file-names" type="string">
            <annotation>
               <documentation>
                  a comma-separated list of file names to be associated with the target content type
               </documentation>
            </annotation>
         </attribute>
         <attribute name="file-extensions" type="string">
            <annotation>
               <documentation>
                  a comma-separated list of file extensions to be associated with the target content type
               </documentation>
            </annotation>
         </attribute>
      </complexType>
   </element>

   <element name="parameter">
      <complexType>
         <attribute name="name" type="string" use="required">
            <annotation>
               <documentation>
                  the name of this parameter made available to instances of the specified content describer class
               </documentation>
            </annotation>
         </attribute>
         <attribute name="value" type="string" use="required">
            <annotation>
               <documentation>
                  an arbitrary value associated with the given name and made available to instances of the specified content describer class
               </documentation>
            </annotation>
         </attribute>
      </complexType>
   </element>

   <element name="property">
      <annotation>
         <documentation>
            Declares a property related to this content type, optionally assigning a default value. See &lt;samp&gt;org.eclipse.core.runtime.content.IContentDescription&lt;/samp&gt; for more information on properties.
         </documentation>
      </annotation>
      <complexType>
         <attribute name="name" type="string" use="required">
            <annotation>
               <documentation>
                  the name of the property. If the property is being overriden and has been originally defined in a different namespace, a fully qualified property name must be used
               </documentation>
            </annotation>
         </attribute>
         <attribute name="default" type="string">
            <annotation>
               <documentation>
                  the default value of the property, or an empty string, if this content type should not have a default value for this property even if a parent has one
               </documentation>
            </annotation>
         </attribute>
      </complexType>
   </element>

   <annotation>
      <appInfo>
         <meta.section type="since"/>
      </appInfo>
      <documentation>
         3.0
      </documentation>
   </annotation>

   <annotation>
      <appInfo>
         <meta.section type="examples"/>
      </appInfo>
      <documentation>
         Following is an example of a XML-based content type declaration using &lt;code&gt;org.eclipse.core.runtime.content.XMLRootElementContentDescriber&lt;/code&gt;, 
a built-in describer: 
&lt;p&gt;
&lt;pre&gt;
   &lt;extension point=&quot;org.eclipse.core.runtime.contentTypes&quot;&gt; 
      &lt;content-type id=&quot;ABC&quot;
       base-type=&quot;org.eclipse.core.runtime.xml&quot;      
       file-extensions=&quot;a,b,c&quot;&gt;
       &lt;describer class=&quot;org.eclipse.core.runtime.content.XMLRootElementContentDescriber&quot;&gt;
        &lt;parameter name=&quot;element&quot; value=&quot;abc&quot;/&gt;
       &lt;/describer&gt;
      &lt;/content-type&gt; 
   &lt;/extension&gt; 
&lt;/pre&gt;
&lt;/p&gt;
Here is an example of a simple text-based content type that has a specific file extension:
&lt;p&gt;
&lt;pre&gt;
   &lt;extension point=&quot;org.eclipse.core.runtime.contentTypes&quot;&gt; 
      &lt;content-type id=&quot;MyText&quot;
       base-type=&quot;org.eclipse.core.runtime.text&quot;
       file-extensions=&quot;mytxt&quot;/&gt;
   &lt;/extension&gt; 
&lt;/pre&gt;
&lt;/p&gt;
When there is need to associate new file names/extensions to an existing content type (as opposed to defining a new content type), a plug-in can contribute a file association as seen below. This has the effect of enhancing the definition of the text content type to include files with names following the &quot;*.mytxt&quot; pattern.
&lt;p&gt;
&lt;pre&gt;
   &lt;extension point=&quot;org.eclipse.core.runtime.contentTypes&quot;&gt; 
      &lt;file-association 
       content-type=&quot;org.eclipse.core.runtime.text&quot;
       file-extensions=&quot;mytxt&quot;/&gt;
   &lt;/extension&gt; 
&lt;/pre&gt;
&lt;/p&gt;
Here is an example of a content type that defines properties:
&lt;pre&gt;
   &lt;extension point=&quot;org.eclipse.core.runtime.contentTypes&quot;&gt; 
      &lt;content-type id=&quot;MyContentType&quot;
       file-extensions=&quot;dat&quot;&gt;
         &lt;property name=&quot;file-format&quot; value=&quot;1&quot;/&gt;
      &lt;/content-type&gt;
   &lt;/extension&gt; 
&lt;/pre&gt;
&lt;/p&gt;
      </documentation>
   </annotation>

   <annotation>
      <appInfo>
         <meta.section type="apiInfo"/>
      </appInfo>
      <documentation>
         The value of the class attribute in the describer element must represent an 
implementor of 
&lt;samp&gt;org.eclipse.core.runtime.content.IContentDescriber&lt;/samp&gt; or &lt;samp&gt;org.eclipse.core.runtime.content.ITextContentDescriber&lt;/samp&gt;.

&lt;samp&gt;org.eclipse.core.runtime.content.IContentDescription&lt;/samp&gt; objects returned by the &lt;samp&gt;org.eclipse.core.runtime.content&lt;/samp&gt; API
      </documentation>
   </annotation>

   <annotation>
      <appInfo>
         <meta.section type="implementation"/>
      </appInfo>
      <documentation>
         &lt;p&gt;The org.eclipse.core.runtime plug-in provides the following content types:&lt;ul&gt;
&lt;li&gt;org.eclipse.core.runtime.text&lt;/li&gt;
&lt;li&gt;org.eclipse.core.runtime.xml&lt;/li&gt;
&lt;/ul&gt;
Other plug-ins in the platform contribute other content types.
&lt;/p&gt;
&lt;p&gt;
Also, the org.eclipse.core.runtime plug-in provides ready-to-use implementations of content describers:&lt;ul&gt;
&lt;li&gt;org.eclipse.core.runtime.content.XMLRootElementContentDescriber&lt;/li&gt;
&lt;li&gt;org.eclipse.core.runtime.content.BinarySignatureDescriber&lt;/li&gt;
&lt;/ul&gt;
&lt;/p&gt;
      </documentation>
   </annotation>

   <annotation>
      <appInfo>
         <meta.section type="copyright"/>
      </appInfo>
      <documentation>
         Copyright (c) 2004, 2005 IBM Corporation and others.&lt;br&gt;
All rights reserved. This program and the accompanying materials are made 
available under the terms of the Eclipse Public License v1.0 which 
accompanies 
this distribution, and is available at 
&lt;a 
href=&quot;http://www.eclipse.org/legal/epl-v10.html&quot;&gt;http://www.eclipse.org/legal/epl-v10.html&lt;/a&gt;
      </documentation>
   </annotation>

</schema>
