FEA DRM Schema Specification (Draft Version 0.2)

Updated Monday, June 27, 2005

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Introduction

The FEA Data Reference Model (DRM) is intended to promote the common identification, use, and appropriate sharing of data/information across the federal government through its standardization of data in the following three areas:

Data Description: A standard approach to describing an agency’s structured, semi-structured, and unstructured data. Structured data includes individual entities (such as those defined within a data architecture), their attributes, and the relationships between them. Unstructured data includes multimedia files, and documents created using earlier versions of applications such as Microsoft Word. Semi-structured data includes Web pages and e-mails.

Data Sharing: A standard approach to describing the characteristics and requirements of interagency data exchanges, including data sources. Defines a standard message structure known as an Information Exchange Package.

Data Context: A standard approach to representing taxonomies that an agency uses to categorize its data. Such categorization enables the business context of data to be well understood.

In order to facilitate implementation of the DRM by federal agencies, OMB will provide agencies with a DRM Schema (also known as a “DRM XML Profile”). The DRM Schema will enable federal agencies to submit XML instances to OMB that contain information for the agency pertaining to the three DRM areas described above. The DRM Schema will also facilitate data modeling efforts within agencies by providing a capability by which – for example – physical data models may be derived from logical data models. Instances of the DRM Schema may also potentially be used for configuration and operational purposes , e.g. to automatically configure and/or categorize a data source, to support service-oriented architecture (SOA) based exchanges between agencies, etc.

For more information on the future direction of the DRM, please visit the following resources:

What's New in this Version:

  1. Integrated the Intelligence Community Information Security Marking (IC ISM) XML Schema Version 2.0. These attributes are being used to provide ISM information to the DataReferenceModel, ExchangePackage, and QueryPoint elements. This attribute group supercedes drm:Classification, which has been deleted.
  2. Added Temporal Coverage elements from the DDMS version 1.2 to the Resource, ExchangePackage, and DataAsset elements.
  3. Added the Terms collection as a child of Attribute. This will allow codelists to be directly attached to attributes in structured data entities.
  4. Added the following values to the type attribute's enumeration: equivalentTo and relatedTo. Reason: provides additional commonly used semantics for describing relationships between taxonomy nodes.
  5. Added PayloadRef as a child of ExchangePackage. Also added PayloadTransport. Reason: the intent of ExchangePackage is to provide high-level metadata about a repeatable exchange, as opposed to the low level technical details about the specific message. Therefore, the exchange package must provide a pointer to the artifact that does provide those details. PayloadRef contains an href attribute that includes the URI pointing to the message payload.
  6. Renamed AccessPoint to QueryPoint. This is a more descriptive name. Also renamed DataAccessPoints to QueryPoints.
  7. Added Geospatial Coverage elements from the DDMS version 1.2 to the Resource, ExchangePackage, and DataAsset elements.
  8. Renamed DataSource to DataAsset. Several elements were impacted by this change (e.g., DataSources, DataSourceRef, etc.).
  9. Changed rdf:id to rdf:ID and rdf:idref to rdf:resource to remain consistent with this document.
  10. Added additional enumeration values to the following elements and attributes: datatype, unit, keyType, and Language.

Implementation Examples:

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Schema Hierarchy

Schema Elements and Attributes

This section provides detailed information on each element and attribute used within the FEA DRM schema. Specifically, it provides a definition, implementation example, related elements and attributes, and other metadata.

drm:DataReferenceModel

(Comments?)

Specifications
Definition: Root node of the DRM XML instance document.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Mandatory
Attributes:
Parent Element(s): None
Child Elements:

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@ rdf:ID

(Comments?)

Specifications
Definition: A unique identifier for an element. This should be in the form of a URI.
Type: Attribute
XSD Data Type: xsd:anyURI
Obligation: Mandatory
Parent Element(s):

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@ xml:base

(Comments?)

Specifications
Definition: Defines a base URI for the document, thereby allowing relative URIs to be used throughout the document.
Type: Attribute
XSD Data Type: xsd:anyURI
Obligation: Optional
Parent Element(s):

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@ ism:classification

(Comments?)

Specifications
Definition: A simple type in which a name token is restricted to the US, non-US, and joint classification portionmark abbreviations from the CAPCO Register. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKEN
Obligation: Mandatory
Parent Element(s):
Legal Values:
  • U
  • C
  • S
  • TS
  • R
  • CTS
  • CTS-B
  • CTS-BALK
  • NU
  • NR
  • NC
  • NS
  • NS-S
  • NS-A
  • CTSA
  • NSAT
  • NCA

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@ ism:ownerProducer

(Comments?)

Specifications
Definition: ISO 3166-1 trigraph(s) of the owner or producer country(ies) and/or CAPCO-specified tetragraphs of international organizations. Either (a) a single trigraph or tetragraph or (b) a space-delimited list of trigraphs followed by tetragraphs. Trigraphs must be in alphabetical order and tetragraphs must be in alphabetical order. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKENS
Obligation: Mandatory
Parent Element(s):

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@ ism:SCIcontrols

(Comments?)

Specifications
Definition: Authorized abbreviation(s) of SCI control system(s). Either (a) a single abbreviation or (b) a space-delimited list of abbreviations in the order prescribed in the CAPCO Register. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKENS
Obligation: Optional
Parent Element(s):

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@ ism:SARIdentifier

(Comments?)

Specifications
Definition: Authorized Special Access Required program digraph(s) or trigraph(s) preceded by "SAR-". Either (a) a single digraph or trigraph or (b) a space-delimited list of digraphs or trigraphs. Example: "SAR-ABC SAR-DEF ..." This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKENS
Obligation: Optional
Parent Element(s):

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@ ism:disseminationControls

(Comments?)

Specifications
Definition: Authorized dissemination control portion mark abbreviation(s). Either (a) a single abbreviation or (b) a space-delimited list of abbreviations in the order shown in the CAPCO Register. Exception: For the "REL" abbreviation, omit the country code trigraph(s) and instead place the trigraph(s) in the "releasableTo" attribute value. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKENS
Obligation: Optional
Parent Element(s):

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@ ism:FGIsourceOpen

(Comments?)

Specifications
Definition: Non-US classification portion marking for foreign government information in a document portion. Use this attribute to record a source country when the intent is to post the document to a shared space with the source identified. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKENS
Obligation: Optional
Parent Element(s):

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@ ism:FGIsourceProtected

(Comments?)

Specifications
Definition: Non-US classification portion marking for foreign government information in a document portion. Use this attribute to record a source country when the intent is to filter out the identity of the source prior to posting the document to a shared space. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKENS
Obligation: Optional
Parent Element(s):

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@ ism:releasableTo

(Comments?)

Specifications
Definition: ISO 3166-1 trigraphic codes of countries to which the associated content can be released. Include "USA" in all instances. Use a space-delimited list with "USA" first, followed by the other trigraph(s) in alphabetical order. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKENS
Obligation: Optional
Parent Element(s):

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@ ism:nonICmarkings

(Comments?)

Specifications
Definition: Authorized non-IC portion marking abbreviation(s) from the CAPCO Register. Either (a) a single non-IC abbreviated marking or (b) a space-delimited list of abbreviations in the order shown in the CAPCO Register. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKENS
Obligation: Optional
Parent Element(s):

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@ ism:classifiedBy

(Comments?)

Specifications
Definition: Use as specified by E.O. 12958. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:string
Obligation: Optional
Parent Element(s):

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@ ism:classificationReason

(Comments?)

Specifications
Definition: A text string containing one or more paragraph numbers, 1.4(a) through 1.4(h), taken from E.O. 12958, as amended. Enter the paragraph references as they should appear in a classification/declassification block. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:string
Obligation: Optional
Parent Element(s):

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@ ism:derivedFrom

(Comments?)

Specifications
Definition: A text string containing (a) the title and date of a specific source document, or (b) the title and date of an organization classification guide, or (c) the literal string "Multiple Sources". This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:string
Obligation: Optional
Parent Element(s):

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@ ism:declassDate

(Comments?)

Specifications
Definition: A specific date, in the format YYYY-MM-DD, at which the applicable information is automatically declassified. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:date
Obligation: Optional
Parent Element(s):

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@ ism:declassEvent

(Comments?)

Specifications
Definition: A textual description of an event that triggers declassification. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:string
Obligation: Optional
Parent Element(s):

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@ ism:declassException

(Comments?)

Specifications
Definition: One or more of the exceptions to 25-year declassification: specify "25X1-human", "25X1", "25X2", ..., "25X9". If more than one exception applies, use a space-delimited list. If "25X1-human" applies, it should be first in a list. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKENS
Obligation: Optional
Parent Element(s):

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@ ism:typeOfExemptedSource

(Comments?)

Specifications
Definition: One or more tokens indicating that a source that is exempted from automatic declassification applies. Specify "OADR", "X1", "X2", ..., "X8". If more than one applies, use a space-delimited list. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:NMTOKENS
Obligation: Optional
Parent Element(s):

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@ ism:dateOfExemptedSource

(Comments?)

Specifications
Definition: A specific date, in the format YYYY-MM-DD. Used in conjunction with attribute "typeOfExemptedSource." If there are multiple exempted sources, specify the date of the exempted source that has the most recent date. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:date
Obligation: Optional
Parent Element(s):

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@ ism:declassManualReview

(Comments?)

Specifications
Definition: A true/false indication that manual review is required for declassification. Use this attribute to force the appearance of "//MR" in the header and footer marking titles. Use this attribute ONLY when it is necessary to override the business logic applied to classification and control markings in the document to determine whether manual review is required. This attribute is imported from the Intelligence Community Information Security Marking (IC ISM) XML schema version 2.0, dated 30 April 2004.
Type: Attribute
XSD Data Type: xsd:boolean
Obligation: Optional
Parent Element(s):

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drm:SubmissionMetadata

(Comments?)

Specifications
Definition: Container for all metadata related to one particular instance of a DRM submission.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Mandatory
Attributes: None
Parent Element(s):
Child Elements:

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drm:SubmittingAgency

(Comments?)

Specifications
Definition: Government agency, bureau, office, or department that submits this DRM instance.
Type: Element
XSD Data Type: xsd:string
Obligation: Mandatory
Attributes: None
Parent Element(s):
Child Elements: None

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drm:SubmissionDate

(Comments?)

Specifications
Definition: Date that this DRM instance was submitted. May include time as well as date.
Type: Element
XSD Data Type: xsd:date
Obligation: Mandatory
Attributes: None
Parent Element(s):
Child Elements: None

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drm:SubmissionVersion

(Comments?)

Specifications
Definition: Any string an agency chooses to differentiate submission version that represent the same set of data elements. Note that the elements SubmissionDate or Identifier could be used to capture version instead.
Type: Element
XSD Data Type: xsd:string
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements: None

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drm:DataDescription

(Comments?)

Specifications
Definition: This element implements the "data description" portion of the DRM meta-model. It provides a standard means for agencies to describe their data and data assets clearly, concisely, and unambiguously.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements:

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drm:Data

(Comments?)

Specifications
Definition: This element contains definitions for structured, semi-structured, and unstructured data.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Mandatory
Attributes: None
Parent Element(s):
Child Elements:

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drm:StructuredData

(Comments?)

Specifications
Definition: Data described via the E-R (Entity-Relationship) or class model.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements:

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drm:Entities

(Comments?)

Specifications
Definition: A collection of entities.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements:

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drm:Entity

(Comments?)

Specifications
Definition: A named template used to describe a population of items with common characteristics. Like the set of persons, places or things.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Conditional
Attributes:
Parent Element(s):
Child Elements:

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@ drm:name

(Comments?)

Specifications
Definition: An element's descriptive name
Type: Attribute
XSD Data Type: xsd:string
Obligation: Mandatory
Parent Element(s):

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@ drm:representationFormat

(Comments?)

Specifications
Definition: Points to the data standard ID defining the format of the external entity reference.
Type: Attribute
XSD Data Type: xsd:anyURI
Obligation: Conditional
Parent Element(s):

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@ drm:href

(Comments?)

Specifications
Definition: The address (absolute or relative) at which an object is reachable.
Type: Attribute
XSD Data Type: xsd:anyURI
Obligation: Conditional
Parent Element(s):

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drm:ResourceRefs

(Comments?)

Specifications
Definition: A collection of ResourceRefs. A ResourceRef links an object with a related resource.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements:

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drm:ResourceRef

(Comments?)

Specifications
Definition: This element points back to a related resource. It is used primarily to elaborate on a relationship between an Entity (or ExternalEntityRef) and a resource that aggregates instances of that entity. For example, a spreadsheet (Resource) that lists employee (Entity) information. It can also be used to link together two resources. It contains two attributes: type and rdf:idref. Type is generally "partOf". rdf:idref points back to the Resource's unique identifier.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes:
Parent Element(s):
Child Elements: None

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@ rdf:resource

(Comments?)

Specifications
Definition: A backward pointer to a unique id for another DRM element.
Type: Attribute
XSD Data Type: xsd:anyURI
Obligation: Mandatory
Parent Element(s):

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@ drm:type

(Comments?)

Specifications
Definition: Describes the type of relationship in a NodeRef or ResourceRef element. Legal values include: "instanceOf", "subclassOf", "partOf", "equivalentTo", and "relatedTo".
Type: Attribute
XSD Data Type: xsd:string
Obligation: Mandatory
Parent Element(s):
Legal Values:
  • instanceOf
  • partOf
  • subclassOf
  • equivalentTo
  • relatedTo

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drm:DataAssetRefs

(Comments?)

Specifications
Definition: A list of data asset references.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements:

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drm:Attributes

(Comments?)

Specifications
Definition: A collection of characteristics that describe the entity (e.g., "first_name", "last_name", etc.).
Type: Element
XSD Data Type: xsd:complexType
Obligation: Conditional
Attributes: None
Parent Element(s):
Child Elements:

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drm:Attribute

(Comments?)

Specifications
Definition: A property belonging to an entity (e.g., "first_name", "last_name", etc.).
Type: Element
XSD Data Type: xsd:complexType
Obligation: Conditional
Attributes:
Parent Element(s):
Child Elements:

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@ drm:datatype

(Comments?)

Specifications
Definition: An attribute's data type. This must be a valid XSD data type.
Type: Attribute
XSD Data Type: xsd:string
Obligation: Conditional
Parent Element(s):
Legal Values:
  • anyURI
  • base64Binary
  • boolean
  • byte
  • date
  • dateTime
  • decimal
  • double
  • duration
  • ENTITIES
  • ENTITY
  • float
  • gDay
  • gMonth
  • gMonthDay
  • gYear
  • gYearMonth
  • hexBinary
  • ID
  • IDREF
  • IDREFS
  • int
  • integer
  • language
  • long
  • Name
  • NCName
  • negativeInteger
  • NMTOKEN
  • NMTOKENS
  • nonNegativeInteger
  • nonPositiveInteger
  • normalizedString
  • NOTATION
  • positiveInteger
  • Qname
  • short
  • string
  • time
  • token
  • unsignedByte
  • unsignedInt
  • unsignedLong
  • unsignedShort

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@ drm:keyType

(Comments?)

Specifications
Definition: Defines what type of key (if any) this attribute is. Legal values include "PK" (primary key), "FK" (foreign key), "any key", or "none".
Type: Attribute
XSD Data Type: xsd:string
Obligation: Optional
Parent Element(s):
Legal Values:
  • ForeignKey
  • none
  • PrimaryKey

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drm:Relationships

(Comments?)

Specifications
Definition: A collection of relationships (associations) between entities.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements:

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drm:Relationship

(Comments?)

Specifications
Definition: An association between two entities.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes:
Parent Element(s):
Child Elements:

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@ drm:key

(Comments?)

Specifications
Definition: This attribute references the key field for a given Entity when elaborating a relationship between two entities
Type: Attribute
XSD Data Type: xsd:string
Obligation: Conditional
Parent Element(s):

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@ drm:cardinality

(Comments?)

Specifications
Definition: The cardinality of a given relationship. One of the following values: zero, one, unbounded, 1 or more, n (any whole number), n-n (any specific range of whole numbers), and 0-1 (zero to one).
Type: Attribute
XSD Data Type: xsd:string
Obligation: Conditional
Parent Element(s):
Legal Values:
  • 0
  • 0-1
  • 1
  • 1 or more
  • n
  • n-n
  • unbounded

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drm:RelationshipTarget

(Comments?)

Specifications
Definition: In a relationship between two entities, this element is used to describe the target entity.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Conditional
Attributes:
Parent Element(s):
Child Elements: None

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drm:DataAssetRef

(Comments?)

Specifications
Definition: A pointer to the unique ID of the associated data asset, either in the DRM instance (rdf:id) or in an external DRM instance (DRM_Instance_URI#rdf:id).
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes:
Parent Element(s):
Child Elements: None

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@ drm:authoritativeSource

(Comments?)

Specifications
Definition: Indicates whether or not the parent datasourceRef is the authoritative source for the entity in question. Boolean element, true or false.
Type: Attribute
XSD Data Type: xsd:boolean
Obligation: Optional
Parent Element(s):

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drm:ExternalEntitiesRefs

(Comments?)

Specifications
Definition: A collection of ExternalEntitiesRefs.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements:

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drm:ExternalEntitiesRef

(Comments?)

Specifications
Definition: Points to an entity (or collection of entities, e.g. a logical data model) defined externally using XMI, OWL, XSD, or other suitable standard. "Suitable" includes:

1. An open, widely implemented standard, available free-of-charge and unencumbered by royalty or patent claims, or a standard implemented by a government agency
2. A well-documented, durable standard (i.e., under version/change control, backward compatibility, etc.)
3. Provides semantics for modeling, at a minimum, entities, attributes, types, and relationships.
4. Provides semantics for assigning an identifier per element that is guaranteed unique within the particular schema.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes:
Parent Element(s):
Child Elements:

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drm:UnstructuredData

(Comments?)

Specifications
Definition: Data that are not described according to an E-R model, but is rather of a more free-form format, such as multimedia files or unstructured text.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements:

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drm:ExternalResourcesRefs

(Comments?)

Specifications
Definition: A collection of ExternalResourcesRefs. These objects are pointers to external files that aggregate unstructured or semistructured resources (e.g., RSS feeds).
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements:

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drm:ExternalResourcesRef

(Comments?)

Specifications
Definition: Points to a URI of a model that aggregates metadata about unstructured or semi-structured resources. Normally points to a RSS, DDMS, or Atom file.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes:
Parent Element(s):
Child Elements:

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drm:Resources

(Comments?)

Specifications
Definition: A collection of resources.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Conditional
Attributes: None
Parent Element(s):
Child Elements:

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drm:Resource

(Comments?)

Specifications
Definition: Encapsulates a single "page view" of unstructured or semi-structured data, referenceable via a URI. This element aggregates numerous sub-elements, mostly metadata tags reused from the Dublin Core 1.1 set.

In some cases, Dublin Core metadata will be embedded in the actual resource itself. In this case, there is no need to repeat the metadata in the DRM instance. The Resource element can point to the actual resource itself, populating the rdf:id attribute with the resource's URI.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes:
Parent Element(s):
Child Elements:

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ddms:geospatialCoverage

(Comments?)

Specifications
Definition: Geographic place names or coordinates that relate to the resource, such as a jurisdiction, point, area, or volume on land, in space, or at sea. This element can contain either a Facility element or Place element, but not both. This element is reused from the Department of Defense (DoD) Discovery Metadata Specification (DDMS) v. 1.2.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements:

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ddms:Place

(Comments?)

Specifications
Definition: The name of a place of interest, other than a country, region, or facility. This element is reused from the Department of Defense (DoD) Discovery Metadata Specification (DDMS) v. 1.2.
Type: Element
XSD Data Type: xsd:complexType
Obligation: Optional
Attributes: None
Parent Element(s):
Child Elements: