Hi, We are meeting requirements where there is a need for more than one hierarchic list of values in a "label". As a solution to this would it be possible to add an "hierarchy" attribute to the tagCategory element that has the same meaning as the hierarchy attribute of the securityClassification element? I'd argue that securityClassification is just a special kind of category anyway and as such shouldn't be represented separately. However, I'm sure this will upset the traditionalists on here J. Many thanks, Piers Piers Chivers Technical Architect Boldon James Limited, a QinetiQ company Mobile +44 (0)7775 997034 Direct +44 (0)1594 531036 Main +44 (0)1270 507800 Email piers.chivers@xxxxxxxxxxxxxxx <mailto:piers.chivers@xxxxxxxxxxxxxxx> Web http://www.boldonjames.com <http://www.boldonjames.com>