eB2Bcom The XML-Enabled Directory (XED) allows the definition of directory attributes whose syntaxes are defined in terms of XML Schema types, RELAX NG patterns or eXtensible Markup Language (XML) document type definition (DTD) element type declarations. This document enables the matching of directory attribute values of such syntaxes by extending existing Lightweight Directory Access Protocol (LDAP) and X.500 directory matching rules.