This is the hash key of the attributes which make up the composite key--- RegistryName and ItemName ---for the Menu Items resource and used to uniquely identify an instance of Menu Items. The client should not generate the hash key value. Instead, the client should query on the Menu Items collection resource with a filter on the primary key values in order to navigate to a specific instance of Menu Items.
For example: publicSectorRegistryItemDefinitions?q=RegistryName=<value1>;ItemName=<value2>
No content. This task does not return elements in the response body.