Table 6.149—DRM_Keywords

Property

Description

Superclass

· <DRM SEDRIS Abstract Base>

Class

· <DRM Keywords>

Subclass

· none

Definition

An object of this DRM class specifies a collection of words or phrases identifying the real-world object represented by the containing SEDRIS object, or identifying the geographic location and/or time period represented by the containing SEDRIS object.

Example(s)

· A <DRM Model> representing an F18C aircraft contains a <DRM Keywords> instance, defined in U.S. English, to support keyword searches on the type of the aircraft. The field values of the <DRM Keywords> instance are:

keyword_count	1
keyword_array[0]. code	OTHER
keyword_array[0]. thesaurus	{DEFAULT, 4, "NONE"}
keyword_array[0]. keyword_list	{DEFAULT, 4, "F18C" }

· A transmittal contains a terrain dataset with roads and lakes located at Fort Hood, Texas. The source dataset has an FGDC metadata record containing keyword information for the entire transmittal.

A <DRM Keywords> instance, defined in U.S. English, is attached to the <DRM Transmittal Root> to transmit this information, containing the following field values:

keyword_count	2
keyword_array[0]. code	PLACE
keyword_array[0]. thesaurus	{DEFAULT, 22, "MEL_Location_Thesaurus"}
keyword_array[0]. keyword_list	{DEFAULT, 16, "Fort Hood; Texas"}
keyword_array[1]. code	THEME
keyword_array[1]. thesaurus	{DEFAULT, 42, "MEL_Scientific_Engineering_Field_Thesaurus" }
keyword_array[1]. keyword_list	{DEFAULT, 20, "Cartography; Mapping"}

Inherited field elements

field_name	range	Field_Data_Type
none

Field elements

field_name	range	Field_Data_Type
keyword_count^1		Short_Integer_Unsigned
keyword_array^2		Keyword_Structure[keyword_count]

Associated to (one-way) (inherited)

· none

Associated to (one-way)

· none

Associated by (one-way) (inherited)

· none

Associated by (one-way)

· none

Associated with (two-way) (inherited)

· none

Associated with (two-way)

· none

Composed of (two-way) (inherited)

· none

Composed of (two-way)

· none

Composed of (two-way metadata) (inherited)

· none

Composed of (two-way metadata)

· none

Component of (two-way) (inherited)

· none

Component of (two-way)

· zero or more <DRM Attribute Set>s

· zero or more <DRM Attribute Set Table>s

· zero or more <DRM Attribute Set Table Group>s

· zero or more <DRM Colour Table>s

· zero or more <DRM Colour Table Group>s

· zero or more <DRM Data Table>s

· zero or more <DRM Environment Root>s

· zero or more <DRM Feature>s

· zero or more <DRM Feature Model>s

· zero or more <DRM Geometry Hierarchy>s

· zero or more <DRM Geometry Model>s

· zero or more <DRM Image>s

· zero or more <DRM Library>s

· zero or more <DRM Model>s

· zero or more <DRM Sound>s

· zero or more <DRM Symbol>s

· zero or one <DRM Transmittal Root>

Constraints

· Mandatory metadata

Notes

¹ The number of entries in keyword_array.

² The actual keyword information; this shall be non-null.

Class diagram

<DRM Keywords>