{{Redirect, DDMS, the Android debugger named Dalvik Debug Monitor Server, Dalvik (software) The Department of Defense Discovery Metadata Specification (DoD Discovery Metadata Specification or DDMS) is a

Net-Centric Enterprise Services Net-Centric Enterprise Services (NCES) is a Department of Defense program, managed by the Defense Information Systems Agency, to develop information technology infrastructure services for future systems used by the United States military. Tech ...

(NCES)

metadata Metadata is "data that provides information about other data", but not the content of the data, such as the text of a message or the image itself. There are many distinct types of metadata, including: * Descriptive metadata – the descriptive ...

initiative In political science, an initiative (also known as a popular initiative or citizens' initiative) is a means by which a petition signed by a certain number of registered voters can force a government to choose either to enact a law or hold a pu ...

. DDMS is loosely based on the

Dublin Core 220px, Logo image of DCMI, which formulates Dublin Core The Dublin Core, also known as the Dublin Core Metadata Element Set (DCMES), is a set of fifteen "core" elements (properties) for describing resources. This fifteen-element Dublin Core has ...

vocabulary. DDMS defines discovery metadata elements for

resources Resource refers to all the materials available in our environment which are technologically accessible, economically feasible and culturally sustainable and help us to satisfy our needs and wants. Resources can broadly be classified upon their a ...

posted to

community A community is a social unit (a group of living things) with commonality such as place, norms, religion, values, customs, or identity. Communities may share a sense of place situated in a given geographical area (e.g. a country, village, tow ...

and

organization An organization or organisation (Commonwealth English; see spelling differences), is an entity—such as a company, an institution, or an association—comprising one or more people and having a particular purpose. The word is derived from ...

al shared spaces. It is sometimes (incorrectly) referred to as ''DoD Discovery Metadata Standard''. The project focuses both on the process of developing a central taxonomy for metadata, and defining a way of discovering resources by their metadata using that taxonomy. The DDMS was created in support of the DoD Net-Centric Data Strategy (dated May 9, 2003), and specifies a set of information fields that are to be used to describe any data or service asset that is made known to the DoD Enterprise. The elements in the DDMS are designed to be platform, language, and implementation-independent, and the specification is described with an

XML Schema An XML schema is a description of a type of Extensible Markup Language, XML document, typically expressed in terms of constraints on the structure and content of documents of that type, above and beyond the basic syntactical constraints imposed ...

. The DDMS is currently on version 5.0 released on January 14, 2013. This is the first version to recast DDMS within the bounds of the Intelligence Community's

Trusted Data Format The Trusted Data Format (TDF) is a data object encoding specification for the purposes of enabling data tagging and cryptographic security features. These features include assertion of data properties or tags, cryptographic binding and data enc ...

specification. In this paradigm, the DDMS metacard is not a standalone top-level construct. Instead, it is a single assertion which decorates a Trusted Data Object, and which is incomplete on its own. DDMS 5.0 also replaces the Geography Markup Language (GML) profile for geospatial information with Time-Space Position Information v2.0 (TSPI). DDMS 5.0 requires TDF V2 and associated IC specifications (ISM V10, NTK V8, VIRT V1).

Structure

The DDMS is designed using a layered approach, combining a Core Layer and an Extensible Layer surrounded by the DDMS Resource Header. The Core Layer is composed of five sets of element categories, each with a specific functional focus for describing a data asset: * The Metacard elements describe the DDMS resource itself. * The Security elements enable the description of security classification of the described resource, Need-to-Know (NTK) information, and related notices. * The Resource elements enable the description of maintenance and administration information. * The Summary Content elements enable the description of concepts and topics. * The Format elements enable the description of physical attributes of the asset. * The Extensible Layer is designed to support domain-specific or

Community of Interest A community of interest, or interest-based community, is a community of people who share a common interest or passion. These people exchange ideas and thoughts about the given passion, but may know (or care) little about each other outside this ar ...

(COI) discovery

requirements, and can be used to extend the element categories identified in the Core Layer. Extensions are expected to be registered in th
DoD Metadata Registry
Extensible attribute spaces are also provided on some elements.

Earlier versions

* DDMS Version 4.1 (released June 12, 2012) * DDMS Version 4.0.1 (released November 18, 2011) * DDMS Version 4.0 (released September 22, 2011) * DDMS Version 3.1 (released July 5, 2011) * DDMS Version 3.0.1 (released March 4, 2011, documentation update only) * DDMS Version 3.0 (released September 2, 2010) * DDMS Version 3.0 Pre-Release (released January 2010, pending ICISM modification). * DDMS Version 2.0 (released July 17, 2008) * DDMS Version 1.4 (released July 1, 2007) * DDMS Version 1.3 (released July 29, 2005) * DDMS Version 1.2 (released January 3, 2005) * DDMS Version 1.1 (released July 1, 2004) * DDMS Version 1.0 (released September 29, 2003) Major version releases contain changes which break backwards compatibility with earlier versions.

References

DDMS Home Page
Metadata United States Department of Defense