Table 6.96—DRM_Feature_Hierarchy

Property

Description

Superclass

·         <DRM Feature>

Class

·         <DRM Feature Hierarchy>

Subclass

·         <DRM Aggregate Feature>

·         <DRM Feature Model Instance>

Definition

This is an abstract DRM class that specifies a hierarchically organized collection of <DRM Feature>s, which can be either a <DRM Aggregate Feature> or a <DRM Feature Model Instance>.

Example(s)

·         A collection of <DRM Feature>s representing an entire transportation network, including roads, railroads, and airfields.

Inherited field elements

field_name

range

Field_Data_Type

none

 

 

Field elements

field_name

range

Field_Data_Type

feature_topology_level

 

Feature_Topology_Level

Associated to (one-way) (inherited)

·         none

Associated to (one-way)

·         none

Associated by (one-way) (inherited)

·         none

Associated by (one-way)

·         zero or one <DRM Hierarchy Summary Item>

Associated with (two-way) (inherited)

·         zero or more <DRM Feature>s

·         zero or more <DRM Geometry Hierarchy>s

·         zero or more <DRM_Property_Grid>s

Associated with (two-way)

·         none

Composed of (two-way) (inherited)

·         zero or more {ordered} <DRM Attribute Set Index>

·         zero or one <DRM Classification Data>

·         zero or more <DRM Label>s

·         zero or more <DRM Property Table>s

·         zero or more <DRM Property Table Reference>s

·         zero or more <DRM Property Value>s

·         zero or one <DRM Rendering Priority Level>

·         zero or one <DRM Time Constraints Data>

Composed of (two-way)

·         zero or one <DRM Reference Surface>

·         zero or more <DRM Sound Instance>s

Composed of (two-way metadata) (inherited)

·         zero or one <DRM Access>

·         zero or more <DRM Browse Media>s

·         zero or one <DRM Citation>

·         zero or more <DRM Cross Reference>s

·         zero or one <DRM Data Quality>

·         zero or one <DRM Description>

·         zero or one <DRM Keywords>

·         zero or one <DRM Point Of Contact>

Composed of (two-way metadata)

·         none

Component of (two-way) (inherited)

·         zero or more <DRM Union Of Features>s

Component of (two-way)

·         zero or more <DRM Alternate Hierarchy Related Features>s through <DRM Hierarchy Data>s

·         zero or more <DRM Classification Related Features>s through <DRM Classification Data>s

·         zero or one <DRM Environment Root>

·         zero or one <DRM Feature Model>

·         zero or more <DRM Level Of Detail Related Features>s through <DRM Base Level Of Detail Data>s

·         zero or more <DRM Oct Tree Related Features>s through <DRM Oct Tree Data>s

·         zero or more <DRM Perimeter Related Features>s through <DRM Perimeter Data>s

·         zero or more <DRM Quad Tree Related Features>s through <DRM Quad Tree Data>s

·         zero or more <DRM Spatial Index Related Features>s through <DRM Spatial Index Data>s

·         zero or more <DRM State Related Features>s through <DRM State Data>s

·         zero or more <DRM Time Related Features>s through <DRM Time Constraints Data>s

Constraints

·         Image mapping functions and texture coordinates

·         No attribute conflicts

·         Non-crossing aggregations

·         Non-crossing associations

·         Non-cyclic aggregations

·         Precedence of Attribute_Set_Index

Notes

1 Added to support “attributes for derived objects.”  That is, these components are used only to specify texture mapping information for geometry that is derived from the <DRM Feature> by the consumer. These <DRM Image Mapping Function>s shall use <DRM Image Anchor> components to specify the mapping.

Class diagram

<DRM Feature Hierarchy>