Table 6.89—DRM_External_Feature_Face_Ring

Property

Description

Superclass

·         <DRM Feature Face Ring>

Class

·         <DRM External Feature Face Ring>

Subclass

·         none

Definition

This DRM class defines a one-directional topological relationship between a <DRM Regular Feature Face> and the ordered collection of one or more <DRM Feature Edge>s that define its outer boundary.

Example(s)

·         The outer boundary of a <DRM Regular Feature Face> representing a lake is defined by two <DRM Feature Edge>s, one defining the north shore of the lake and the other defining the south shore. These two <DRM Feature Edge>s are the components of an <DRM External Feature Face Ring>, which is in turn a component of the <DRM Regular Feature Face>. The <DRM Edge Direction> associated with each <DRM Feature Edge> indicates its orientation with respect to the ring.

Inherited field elements

field_name

range

Field_Data_Type

none

 

 

Field elements

field_name

range

Field_Data_Type

none

 

 

Associated to (one-way) (inherited)

·         one or more {ordered} <DRM Feature Edge>s through <DRM Edge Direction>s

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)

·         one <DRM Regular Feature Face>

Constraints

·         Feature ring edge consistency

Notes

none

Class diagram

<DRM External Feature Face Ring>