News Architecture (NAR) 1.1 for IPTC G2-Standards - Knowledge Item XML Schema, document version 3 Date of creation of this XML Schema version: 2007-09-28 Date of creation of this XML Schema document version: 2008-02-21 Schema created for the IPTC by Jay Cousins, RivCom Ltd (jay.cousins@rivcom.com), Ulf Wingstedt, CNet Svenska AB (ulf.wingstedt@cnet.se) Schema maintained for the IPTC by Laurent Le Meur (AFP) An Item used for collating a set of concept definitions to form the physical representation of a controlled vocabulary Content Metadata for a Knowledge Item An unordered set of concepts A set of properties defining a concept