From: http://www.bell-labs.com/mailing-lists/iptel/draft-ietf-iptel-cpl-00.txt Appendix A. The XML DTD for CPL -------------- This section includes a full DTD describing the XML syntax of the CPL. Every script submitted to a CPL server SHOULD comply with this DTD; however, CPL servers SHOULD allow minor variations from it, particularly in the ordering of output branches of nodes. Note that compliance with this DTD is not a sufficient condition for correctness of a CPL script, as many of the conditions described above are not expressible in DTD syntax. ------------- ------------------------------------------------