NewsML-G2 2.36 Knowledge Item XML Schema, document version 1 Approval of this XML Schema version: 2026-10-21 Any changes applied to this version of the XML Schema can be found at http://dev.iptc.org/G2-Approved-Changes Date of creation of this XML Schema document revision: 2026-09-11 Schema design created for the IPTC in 2008 by Jay Cousins, RivCom Ltd (jay.cousins@rivcom.com), Ulf Wingstedt, CNet Svenska AB (ulf.wingstedt@cnet.se) Schema maintained for the IPTC by Brendan Quinn (IPTC) and Dave Compton (LSEG Data & Analytics), version 2.6 to 2.27 by Michael Steidl (IPTC), up to version 2.5 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 NewsML-G2 2.11: conceptSet was made a global declaration An unordered set of concepts A set of properties defining a concept NewsML-G2 2.17: schemeMeta added Metadata about a scheme conveyed by a Knowledge Item Extension Property; the semantics are defined by the concept referenced by the rel attribute. The semantics of the Extension Property must have the same scope as the parent property. Extension point for provider-defined properties from other namespaces The URI which identifies the scheme The alias preferred by the schema authority List of all concept types used within this Knowledge Item The date (and, optionally, the time) when the scheme was created. This must not be later than the creation timestamp of any concepts in the scheme (identified by the schemeMeta @uri). The date (and, optionally, the time) when the scheme was last modified. The initial value is the date (and, optionally, the time) of creation of the scheme (identified by the schemeMeta @uri). The date (and, optionally, the time) after which the scheme should not be used anymore. If a scheme is marked as retired, then all concepts in that scheme (identified by the schemeMeta @uri) must also be retired.