<test>&#10;<id1 UniqueName="AC456"></id1>&#10;<id2 UName="Q123"></id2>&#10;<idref reference="AC456 Q123"></idref>&#10;Positive test for validity constraint of IDREFS.&#10;In an attribute decl, values of type IDREFS match tha name production&#10;and the IDREFS value matches the values assigned to an ID attributes somewhere&#10;in the XML document.&#10;</test>