org.eclipse.vex.projectplan/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension
         point="org.eclipse.core.contenttype.contentTypes">
      <content-type
            base-type="org.eclipse.vex.ui.XmlDocument"
            file-extensions="xml, projectplan"
            id="org.eclipse.vex.projectplan"
            name="%contentType.name"
            priority="normal">
      </content-type>
   </extension>
   <extension
         point="org.eclipse.wst.xml.core.catalogContributions">
      <catalogContribution>
         <uri
               name="http://www.eclipse.org/project/plan"
               uri="xsd/plan.xsd">
         </uri>
         <uri
               name="http://www.w3.org/1999/xhtml"
               uri="http://www.w3.org/2002/08/xhtml/xhtml1-strict.xsd">
         </uri>
      </catalogContribution>
   </extension>
   <extension
         id="plan"
         name="Eclipse Project Plan"
         point="org.eclipse.vex.ui.doctypes">
      <doctype
            publicId="http://www.eclipse.org/project/plan"
            systemId="xsd/plan.xsd">
         <rootElement
               name="plan">
         </rootElement>
      </doctype>
   </extension>
   <extension
         id="plan-default"
         name="Project Plan Default"
         point="org.eclipse.vex.ui.styles">
      <style
            css="styles/plan-default.css">
         <doctypeRef
               publicId="http://www.eclipse.org/project/plan"></doctypeRef>
      </style>
   </extension>

</plugin>