A reference to a SUBDOC or unparsed (CDATA, SDATA, NDATA) entity cannot be allowed at the current point. The entity's text will not be processed.

#0033   Markup Error

ISO 8879, 9.4

A reference to a SUBDOC or unparsed (CDATA, SDATA, NDATA) entity cannot be allowed at the current point. The entity's text will not be processed.