This XML Schema implements elements and attribute groups of the Department of Defense
Discovery Metadata Specification (DDMS Spec), with a version number the same as that
in the above 'version' attribute of the 'xs:schema' element. Unless otherwise stated,
all references to the DDMS Spec refer to that version of the document.
Change Log:
6/05/2007 (J. Pantella) -- Created pursuant to approved CR 2007-1. See also http://metadata.dod.mil/irs/DDMS/cm/CR/2007/DDMS_CR_2007-1.
1/3/2007 (J. Pantella) -- Modified version attribute to reflect that this is version
1.4.2.
7/1/2008 (D. Barclay) -- Made elements "extent" and "medium" optional in type
MediaType (per DDMS-CR-2008-6).
7/15/2008 (J. Pantella) -- Modified security attributes on creator, publisher,
and contributor to be optional, added optional security attributes to pointOfContact
for consistency across the elements.
7/15/2008 (J. Pantella) -- Modified version to reflect that this is version 2.0.
1/5/2010 (P. Lunceford) -- Created DDMS 3.0. Implemented CRs 2009-04 (replaced
creatorType/publisherType/contributorType/pointOfContactType with contactInfoType),
2009-07 (set minOccurs on RelatedResourceType to 1), 2009-09 (added Unknown entity
to accompany Person, Organization, and Service for a choice for Creator, Publisher,
Contributor, and PointOfContact), 2009-10 (added extensions to CompoundKeywordIdentifierType
and CompoundCategoryIdentifierType), and 2009-12 (added Security Markings to SubjectCoverageType,
CompoundSouceIdentifierType, TemporalCoverageType, and VirtualCoverageType).
6/05/2011 (E. Hughes) -- Created DDMS 3.1. Implemented CR 2011-1 to create DDMS-Includes.xsd
wherein all IC-ISM references are consolidated.
6/05/2011 (E. Hughes) -- Added approvedOn attribute pursuant to CR 2011-5.
11/11/2011 (E. Hughes) -- Implemented CR 2011-17 to use IC-ISM POCType.
05/25/2012 (E. Hughes and P. Attas) - Implemented CR_2011-18, CR_2012-01, CR_2012-02,
and CR2012-03.