This schema is an implementation of the Department of Defense Discovery Metadata Specification version 3.0. By the DDMS Focus Group: Robert Allegar - Booz Allen Hamilton Arsic Antoinette - Mitre Corp. Wil Bailey - DLA Daniel Barclay - FGM, Inc. Brian Brotsos - SAIC Clive Carpi - SAIC Mike Daconta - McDonald Bradley Stan Davis - DISA Michael Fontaine - OSD/NII Glenda Hayes - Mitre Corp. Kirk Maskalenko - FGM, Inc. Mary Ann Melosh - SAIC Eric Peterson - McDonald Bradley Jim Pipher - DISA Joseph J. Pantella, FGM, Inc. Glenn Pruitt - FGM, Inc. Tony Reggio - Pennsylvania State University Kyle Rice - McDonald Bradley Clay Robinson - OSD/NII Rebecca Smith - DIA Brian Sullivan - NGA (NIMA) Eric Yuan - Booz Allen Hamilton JJP

Change Log: 07/13/2004 (J. Pantella) -- Added a global classification attribute per CR #1 of July 1, 2004 DDMS modification. 07/13/2004 (J. Pantella) -- Modified title and subtitle elements to use the classification attribute per CR #1 of July 1, 2004 DDMS modification. 07/13/2004 (J. Pantella) -- Modified SubjectType category and keywords per CR #2 of July 1, 2004 DDMS modification. NOTE: At least one of either Keyword or Category must appear, after one instance of either appears, additional categories must appear before additional keywords. 07/13/2004 (J. Pantella) -- Modified CompoundSourceIdentifierType to support the schema qualifier and schema HREF attributes on the source element per CR#4 of July 1, 2004 DDMS modification. 07/14/2004 (J. Pantella) -- Fixed bug that prevented street address information from being included in the Place and Facility elements. 07/26/2004 (J. Pantella) -- Modified the qualifier attribute of the CompoundCategoryIdentifierType used in the category element to be of type xs:anyURI. 08/04/2004 (J. Pantella) -- Modified Place and Facility to support the state element. 08/04/2004 (J. Pantella) -- Removed AddressType because it was not used. 08/06/2004 (J. Pantella) -- Required xs:any element to have a minoccurs of 0. 08/11/2004 (J. Pantella) -- Modified contributor, producer, creator and pointOfContact to be of respective types. Eliminated the substitution group solution previously employed. 08/16/2004 (J. Pantella) -- Modified CompoundResourceIdentifierType and QualifiedExtentValueType qualifier attributes to be of xs:anyURI per Tiger Team. 08/17/2004 (J. Pantella) -- Modified the target namespace to reflect the needs identified in the Registry meetings (G. Hayes in attendance). 08/23/2004 (J. Pantella) -- Added comments to annotate changes made by the Tiger Team. 11/23/2004 (J. Pantella) -- Modified title, subtitle, description, publisher, contributor, creator and security elements to reuse the ICISM:SecurityAttributesGroup. 11/23/2004 (J. Pantella) -- Removed prior implementation of security and classification attributes. 11/23/2004 (J. Pantella) -- Modified the temporalCoverage sub-elements to provide mechanism to specify Unknown or Not Applicable value defaulting to Unknown persuant to the approval of CR#11. 12/12/2004 (J. Pantella) -- Modified subjectType to eliminate redundancy causing tool issues. 12/16/2004 (J. Pantella) -- Commented out all residual elements and types related to the previous, substitution group based, modeling of the creator, publisher, and contributor. 1/2/2005 (J. Pantella) -- Modified namespace and comments to remove anticipated name change. 1/19/2005 (J. Pantella) -- Modified title and subtitle to support mulitple appearances. 6/22/2005 (J.Pantella) -- Modified geospatialCoverage element to support a richer geospatial description compliant with ISO 19115, pursuant to the approval of CR #13, the geospatialCoverage elment within a Resource is not strictly mandatory per the specification. 7/20/2005 (J.Pantella) -- Changed geospatialCoverage/Place to geospatialCoverage/GeospatialExtent per comments from NGA et al. at IC MWG meeting of July 8, 2005. 6/05/2007 (J. Pantella) -- Modified the SubjectType to comply with the approved resolution of CR 2006-1. See also http://metadata.dod.mil/mdr/irs/DDMS/cm/CR/2006/DDMS-CR-2006-1. 6/05/2007 (J. Pantella) -- Modified the DDMS XML Schema file structure to reflect the approved changes per CR 2007-1. See also http://metadata.dod.mil/mdr/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. 1/3/2007 (J. Pantella) -- Corrected spelling error in the top level documentation element of the XML Schema. 7/15/2008 (J. Pantella) -- Modified creator, publisher, contributor, and pointOfContact to fall under a mandatory choice. The desired effect is that one or more creator, publisher, contributor, or pointOfContact elements may appear in a DDMS instance, but there must be at least one. Change is pursuant to CR 2008-3. See also http://metadata.dod.mil/mdr/irs/DDMS/cm/CR/2008/DDMS-CR-2008-3. 7/15/2008 (J. Pantella) -- Modified ddms:Resource to support a relatedResources element allowing a DDMS instance document to assert relationships between the described resource and other related resources. 1/4/2010 (P. Lunceford) -- Created DDMS 3.0. Implemented CR 2009-08 (make maxOccurs on any to be unbounded), and CR 2009-12 (adding Security markings to the header and requiring a ddmsRecordDate).