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Chapter 5. Writing Agent Plug-ins: Procedures

5.1. Tip: Checking XSD Annotations

There are a couple of XSD files that provide elements for agent (resource) plug-ins: rhq-configuration.xsd and rhq-plugin.xsd.
Different properties and attributes are defined in these schema files. They are annotated so you can see what the existing, default schema makes available.
For example, for the subCategory attribute: 
	     
      <xs:attribute name="subCategory" use="optional">
         <xs:annotation>
            <xs:documentation>
               Resource types can be grouped into subcategories. A subcategory
               defines "like" resource types so they can, for example, be shown together
               in a UI group tab. You can, therefore, define multiple resource types
               and group them together by making their subCategory attributes the same.
            </xs:documentation>
         </xs:annotation>
      </xs:attribute>
Read through the annotations in the XSD files to help plan what your plug-in will do and determine whether your configuration requires custom schema.
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