Expands to the attribute values of the current object in either the current operation or the source data store. It can logically be thought of as the union of <token-op-attr> and <token-src-attr>. If its parent element is <arg-node-set> then all the available <value> elements are returned as nodes in a node set. Otherwise the first available value is returned as a string.
<token-attr name="OU"/>
EMPTY
Empty