2.  Software Infrastructure

2.1.           Application Integration and Middleware Software

2.1.4.          Integration Enablers

2.1.4.1.         EDI

2.1.4.2.         XML
XML is an application profile or restricted form of SGML, the Standard Generalized Markup Language [ISO 8879].
XML General: http://www.w3.org/XML/
XML 1.0 (Fifth Edition) W3C Recommendation 26 November 2008 http://www.w3.org/TR/2008/REC-xml-20081126/
XML Conformance Testing: http://www.w3.org/XML/Test/

2.5.           Security Software

2.5.11.       Network Security