Application Integration 
			
			- Application Integration
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      fn:id(arg, node)
| Argument  | Required/Optional  | Description  | 
|---|---|---|
| arg | Required | One or more ID values (space-separated tokens) to
                                locate matching elements. | 
| node | Optional | The node that provides the context for resolving
                                the IDs. Defaults to the root node of the context item if
                                omitted. |