Constraint

Identifier	Title / Description	Value Domain	Card	Condition	Mapping specific notes	Guidelines	Example
RSSCST [DMF/Core]	Resource Security Constraint This element provides a means to express a set of security constraints applicable to the resource	Security Constraint	0..*		There may be many instances of the resourceConstraints property. The order of these instances is not fixed.	If the classification used is a national classification, ISO 3-letter code should be used for MDSCST.system	MDSCST.level = unclassified
RSREL [DMF/Defence]	Resource Releasability This element provides a means to express a set of releasability information applicable to the resource.	Releasability	0..*			To be compatible with NATO requirements, the String value should be an ISO 3-letter code.	GBR,FRA,DEU
RSUSE [DMF/Core]	Resource Use Limitation This element provides a means to express general use limitations (limitations not implied by security or legal constraints) of the resource.	Free Text	0..*			Standardized phrases could be considered based on known products and/or output.	Defence purposes only
RSLCST [DMF/Core]	Resource Legal Constraint This element provides a means to express a set of legal constraints applicable to the resource.	Legal Constraint	0..*				restricted

DMF/Core	DMF/Core defines the minimum set of metadata elements to be implemented by any metadata catalogue. This set satisfies the discovery use case.
DMF/Common	DMF/Common is an additional set of metadata elements for a more complete description of any type of resource supported by DMF. It extends DMF/Core and covers discovery and basic evaluation use cases.
DMF/Defence	DMF/Defence extends DMF/Core or DMF/Common for military oriented needs including NATO needs (extensions defined in NGMP, particularly security). It is needed to handle metadata to be exchanged with NATO in conformance with NGMP. DMF/Defence can be implemented with DMF/Core and possibly any other metadata class.