DOM2SAX code replaced. Copied and adapted from Xalan-J: http://svn.apache.org/repos/asf/xalan/java/trunk/src/org/apache/xalan/xsltc/trax/DOM2SAX.java There were issues with well-formedness and namespace prefixes when an XMP fragment was serialized to XML. Now this works fine.
xmlgraphics/fop/trunk/src/java/org/apache/fop/fo/extensions/xmp/XMPMetadata.java