2.2.3.1.10 Categories Attribute

If present, this attribute specifies a list of category GUID. An update is included only if it is associated with one of the categories specified. If the attribute is absent, the update can be associated with any category.

The list of allowable categories is defined as a string of an XML fragment:

  
 '<root><CategoryID>CATEGORY_ID</CategoryID>...</root>'

Because this is an attribute, the XML fragment has to be escaped, for example:

  
 Categories="&lt;root&gt;&lt;CategoryID&gt;CATEGORY_ID&lt;/CategoryID&gt;&lt;/root&gt;"