Table 6.234—DRM_Regular_Feature_Face

Property

Description

Superclass

·         <DRM Feature Face>

Class

·         <DRM Regular Feature Face>

Subclass

·         none

Definition

An object of this DRM class specifies a <DRM Feature Face> instance that has a finite extent, and therefore an explicit outer boundary.

Example(s)

·         An <DRM Area Feature> representing a forest would be defined by one or more <DRM Regular Feature Face>s.

·         The outer boundary of a <DRM Regular Feature Face> representing a lake is defined by a single <DRM Feature Edge>. This <DRM Feature Edge> will be the sole component of the <DRM External Feature Face Ring> component of the <DRM Regular Feature Face>. Another <DRM Regular Feature Face> represents an island in the lake. Its boundary is also defined by a single <DRM Feature Edge>. This second <DRM Feature Edge> will be the sole component of an <DRM Internal Feature Face Ring> component of the <DRM Regular Feature Face> that represents the lake, and will also be the sole component of the <DRM External Feature Face Ring> of the <DRM Regular Feature Face> that represents the island.

Regular Feature Face, Example 2

Inherited field elements

field_name

range

Field_Data_Type

none

 

 

Field elements

field_name

range

Field_Data_Type

none

 

 

Associated to (one-way) (inherited)

·         none

Associated to (one-way)

·         none

Associated by (one-way) (inherited)

·         one or more <DRM Feature Edge>s1

Associated by (one-way)

·         none

Associated with (two-way) (inherited)

·         zero or more <DRM Areal Feature>s through <DRM Face Direction>s

·         zero or one <DRM Feature Face>

·         zero or more <DRM Feature Node>2

Associated with (two-way)

·         none

Composed of (two-way) (inherited)

·         zero or one <DRM Feature ID>

·         zero or more <DRM Internal Feature Face Ring>s

·         zero or more <DRM Property Value>s

·         zero or more <DRM Same As Feature Face>s

Composed of (two-way)

·         one <DRM External Feature Face Ring>

Composed of (two-way metadata) (inherited)

·         none

Composed of (two-way metadata)

·         none

Component of (two-way) (inherited)

·         zero or more <DRM Union Of Feature Topology>s

Component of (two-way)

·         none

Constraints

·         Contained node restrictions

·         Edges bordering faces

·         Feature_Edge restrictions

·         No attribute conflicts

·         Non-crossing associations

Notes

1 The <DRM Feature Edge>s that border this <DRM Feature Face>; the converse of this relationship is that between <DRM Feature Face Ring> and <DRM Feature Edge>.

2 The <DRM Feature Node> contained within the <DRM Feature Face>, if any.

Class diagram

<DRM Regular Feature Face>