ISO/IEC 18023-1:200x(E) — Table 6.123 DRM

Table 6.123 — DRM_Keywords

Property

Description

Class

<DRM Keywords>

Superclass

<DRM SEDRIS Abstract Base>

Subclass

None.

Definition

An instance of this DRM class specifies keywords, as well as their type and reference source, for the containing SEDRIS object.

Class diagram

Figure 6.143 — DRM_Keywords

Inherited field elements

Field name	Range	Field data type
None

Field elements

Field name	Range	Field data type
keyword_count ¹		Short_Integer_Positive
keyword_array ²		String[keyword_count]
type ³		Keyword_Type_Code

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 metadata) (inherited)

None.

Composed of (two-way metadata)

zero or one <DRM Citation> instance⁴

Component of (two-way) (inherited)

None.

Component of (two-way)

one or more <DRM Description> instances

Constraints

Clarifications

¹ This specifies the number of entries in keyword_array.

² Each entry of this array is a commonly used word or a formalized word or phrase used to describe the subject.

³ This identifies the subject matter used to group similar keywords in the given instance of <DRM Keywords>.

⁴ If provided, this identifies the formally registered thesaurus (or a similar authoritative source of keywords) from which the entries of keyword_array were drawn.

Example(s)

Consider a <DRM Model> representing an F18C aircraft, such that the <DRM Model> contains a <DRM Keywords> instance specified in U.S. English, in order to support keyword searches on the type of aircraft. The <DRM Keywords> instance has the following structure:

<DRM Keywords>

keyword_count 1

keyword_array[0] { SE_LOCALE_DEFAULT, 4, “F18C” }

type THEME

Consider a transmittal containing a terrain dataset representing roads and lakes located at Fort Hood, Texas. The source dataset has a [ISO 19115] metadata record containing keyword information for the entire transmittal.

The following <DRM Keywords> instances, defined in U.S. English, is attached to the <DRM Transmittal Root> to transmit this information as follows.

<DRM Keywords>

keyword_count 2

keyword_array[0] { SE_LOCALE_DEFAULT, 9, “Fort Hood” }

keyword_array[1] { SE_LOCALE_DEFAULT, 5, “Texas” }

type PLACE

<>

|

<DRM Citation>

title { SE_LOCALE_DEFAULT, 22, “MEL_Location_Thesaurus” }

edition { empty_string }

series_name { empty_string }

issue_identification { empty_string }

other_citation_details { empty_string }

<>

|

<DRM Responsible_Party> (for MEL thesauri)

<DRM Keywords>

keyword_count 2

keyword_array[0] { SE_LOCALE_DEFAULT, 11, “Cartography” }

keyword_array[1] { SE_LOCALE_DEFAULT, 7, “Mapping” }

type THEME

<>

|

<DRM Citation>

title { SE_LOCALE_DEFAULT, 42, “MEL_Scientific-Engineering_Field_Thesaurus” }

edition { empty_string }

series_name { empty_string }

issue_identification { empty_string }

other_citation_details { empty_string }

<>

|

<DRM Responsible_Party> (for MEL thesauri, shared)