Is the eContracts Schema a DTD, XSD or something else?
The eContracts Schema is provided in Relax NG compact syntax, XML Schema (XSD) and as a DTD. The Relax NG compact syntax version is normative. The XSD version is generated from the Relax NG version using Trang, available from www.thaiopensource.com/relaxng/trang.html The DTD version is created manually. The eContracts Schema uses features that cannot be represented in DTD syntax, as described in the eContracts specification.