Table 6.262 — DRM_State_Related_Features

Property

Description

Class
  • <DRM State Related Features>

Superclass

Subclass
  • None.

Definition

An instance of this DRM class specifies a mechanism for specifying discrete states from a possibly continuous state value. Each discrete state corresponds to a branch of the <DRM State Related Features> instance and is identified by the <DRM State Data> instance for that branch; the state value itself is given by the state_tag of the <DRM State Related Features> instance.

The state_tag field specifies the state by which the component <DRM Feature Hierarchy> instances are being differentiated, and shall be an EAC that is designated as state applicable.

The active_state_value field specifies the default state. If the given <DRM State Related Features> instance has a <DRM State Control Link> component, this field is the target of that <DRM State Control Link> instance.

Clarifications

1 An association between two <DRM Feature Representation> instances indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> instance on the association relationship.

2 An association between a <DRM Geometry Hierarchy> instance and a <DRM Feature Representation> instance indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> instance on the association relationship.

3 An association between a <DRM Property Grid> instance and a <DRM Feature Representation> instance indicates that the environmental object(s) represented by the <DRM Feature Representation> instance and the <DRM Property Grid> instance (or some specific cell data within that <DRM Property Grid> instance) have the semantic relationship indicated by the <DRM Base Association Data> instance on the association relationship. Each associated <DRM Property Grid> instance will indicate whether the entire <DRM Property Grid> instance or only some specific cell data within it is participating in the relationship in question.

4 An association between two <DRM Feature Representation> instances indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> instance on the association relationship.

5 An association between a <DRM Geometry Hierarchy> instance and a <DRM Feature Representation> instance indicates that the environmental object(s) that they represent have the semantic relationship indicated by the <DRM Base Association Data> instance on the association relationship.

6 An association between a <DRM Property Grid> instance and a <DRM Feature Representation> instance indicates that the environmental object(s) represented by the <DRM Feature Representation> instance and the <DRM Property Grid> instance (or some specific cell data within that <DRM Property Grid> instance) have the semantic relationship indicated by the <DRM Base Association Data> instance on the association relationship. Each associated <DRM Property Grid> instance will indicate whether the entire <DRM Property Grid> instance or only some specific cell data within it is participating in the relationship in question.

7 This relationship exists to support attributes for derived objects. That is, these components are used only to specify texture mapping information for geometry that is to be derived from the <DRM Aggregate Feature> by the consumer. These <DRM Image Mapping Function> instances shall use <DRM Image Anchor> components to specify the mapping.

8 This is needed for cases in which an <DRM Aggregate Feature> is significant only for a particular domain, such as radar.

Class diagram

Figure 6.311 — DRM_State_Related_Features

Inherited field elements

Field name

Range

Field data type

unique_descendants

 

Boolean

strict_organizing_principle

 

Boolean

Field elements

Field name

Range

Field data type

state_tag

 

EDCS_Attribute_Code

active_state_value

 

EDCS_Attribute_Value

Associated to (one-way) (inherited)

Associated to (one-way)
  • None.

Associated by (one-way) (inherited)

Associated by (one-way)
  • None.

Associated with (two-way) (inherited)
  • None.

Associated with (two-way)
  • None.

Composed of (two-way) (inherited)

Composed of (two-way)

Composed of (two-way metadata) (inherited)

Composed of (two-way metadata)
  • None.

Component of (two-way) (inherited)

Component of (two-way)
  • None.

Constraints

Example(s)

  • Consider a <DRM Feature Model> instance representing a road in various states of damage (in this example, after flooding). The road’s topological connections are different in various states of damage, due to bridges being washed away and various road segments being blocked due to fallen trees and other factors.

    Consequently, the <DRM Feature Model> instance consists of a <DRM State Related Features> instance, with state_tag = EAC_GENERAL_DAMAGE_FRACTION and active_state = 0,0%. This specifies that initially the road is undamaged before flooding takes place.

    State Related Features, Example 1

    Figure 6.312 — <DRM State Related Features> example

    The <DRM State Data> instance for each branch indicates the range of percent damage for which that branch describes the road’s feature topology.