Abstract Class Name: Feature Hierarchy

Superclass - <Feature>

Subclasses

• <Aggregate Feature>
• <Feature Model Instance>

Definition

An instance of one of the concrete subclasses of this DRM class is a hierarchically organized collection of <Feature> instances.

Primary Page in DRM Diagram:

• 8

Secondary Pages in DRM Diagram:

• 1
• 2
• 7
• 21

Example

See subclasses for examples.

FAQs

Where can users find further information on feature topology in SEDRIS?

See Part 4, Volume 4 Topology Technical Guide of the SEDRIS Documentation Set for further information.

Why can't a <Reference Surface> be associated to a <Feature Hierarchy>, as with <Geometry Hierarchy>?

A <Reference Surface> is associated to a <Geometry Hierarchy> to indicate that the <Geometry Hierarchy> contains a resolution surface. <Feature Hierarchy> instances are not used to represent resolution surfaces.

Constraints

• <<No Attribute Conflicts>>
• <<Non Crossing Aggregations>>
• <<Non Crossing Associations>>
• <<Precedence of Attribute Set Index>>
• <<Non Cyclic Aggregations>>

Associated by (one-way)

• zero or one <Hierarchy Summary Item> instance

Associated with (two-way)(inherited)

• zero or more <Feature> instances (notes)
• zero or more <Geometry Hierarchy> instances (notes)
• zero or more <Property Grid> instances (notes)

Composed of (two-way)(inherited)

• zero or more {ordered} <Attribute Set Index> instances
• zero or one <Classification Data> instance
• zero or more <Label> instances
• zero or more <Property Table> instances
• zero or more <Property Table Reference> instances
• zero or more <Property Value> instances
• zero or one <Rendering Priority Level> instance

Composed of (two-way)

• zero or one <Reference Surface> instance
• zero or more <Sound Instance> instances

Composed of (two-way metadata)(inherited)

• zero or one <Access> instance
• zero or more <Browse Media> instances
• zero or more <Cross Reference> instances
• zero or one <Data Quality> instance
• zero or one <Keywords> instance
• zero or one <Point Of Contact> instance
• zero or one <Time Constraints Data> instance

Component of (two-way)(inherited)

• zero or more <Union Of Features> instances

Component of (two-way)

• zero or more <Alternate Hierarchy Related Features> instances through <Hierarchy Data>
• zero or more <Classification Related Features> instances through <Classification Data>
• zero or one <Environment Root> instance
• zero or one <Feature Model> instance
• zero or more <Level Of Detail Related Features> instances through <Base Level Of Detail Data>
• zero or more <Oct Tree Related Features> instances through <Oct Tree Data>
• zero or more <Perimeter Related Features> instances through <Perimeter Data>
• zero or more <Quad Tree Related Features> instances through <Quad Tree Data>
• zero or more <Spatial Index Related Features> instances through <Spatial Index Data>
• zero or more <State Related Features> instances through <State Data>
• zero or more <Time Related Features> instances through <Time Constraints Data>

Inherited Field Elements

Notes

Associated with Notes

Feature

 An association between two <Feature> instances indicates
 that they are alternate representations of the same
 environmental object.

Geometry_Hierarchy

 An association between a <Geometry Hierarchy> instance and a
 <Feature> instance indicates that the <Geometry Hierarchy>
 and the <Feature> are alternate representations of the same
 environmental object.

Property_Grid

 An association between a <Property Grid> instance and a
 <Feature> instance indicates that the <Feature> and the <Property Grid>
 (or some specific cell data within that <Property Grid>) are
 alternate representations of the same environmental object.
 Each associated <Property Grid> will indicate which is the case.