                  <A HREF="../../../../../../org/apache/xerces/impl/dv/ValidationContext.html">ValidationContext</A>&nbsp;context)
              throws <A HREF="../../../../../../org/apache/xerces/impl/dv/InvalidDatatypeValueException.html">InvalidDatatypeValueException</A></PRE>
<DL>
<DD>Checks that "content" string is valid IDREF value.
 If invalid a Datatype validation exception is thrown.<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../../../org/apache/xerces/impl/dv/dtd/IDREFDatatypeValidat