Table 6.23— DRM_Attribute_Set

Property

Description

Superclass

· <DRM SEDRIS Abstract Base>

Class

· <DRM Attribute Set>

Subclass

· none

Definition

Groups together a set of instances of classes that

have component relationships with <DRM Geometry> and / or <DRM Feature>, and

which specify either 'attributes', such as <DRM Rendering Priority Level>, or metadata.

An <DRM Attribute Set> instance provides a mechanism for a set of 'attributes' to be explicitly reused by many <DRM Geometry> and/or <DRM Feature> instances.

Example(s)

· A number of polygons that are all coloured red and rendered using flat shading each contain the same <DRM Attribute Set> containing a <DRM Colour> instance specifying red and a <DRM Rendering Properties> instance specifying flat shading.

· A number of polygons that are all coloured green, have grass texture that is modulated and have a SURFACE_MATERIAL_TYPE specifying GRASS. A <DRM Attribute Set> containing a <DRM Colour> instance specifying green, a <DRM Image Mapping Function> instance specifying IMAGE_MAPPING_METHOD = MODULATE, and a <DRM Property Value> instance specifying a SURFACE_MATERIAL_TYPE value of GRASS.

· A number of polygons that all have the same electromagnetic properties and are coloured grey. A common <DRM Attribute Set> would contain a <DRM Colour> instance specifying grey and a <DRM Property Table Reference> into a <DRM Property Table> of electromagnetic properties.

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)

· 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)

· zero or one <DRM Classification Data>

· zero or more <DRM Colour>s

· zero or more {ordered} <DRM Image Mapping Function>s

· zero or one <DRM Light Rendering Properties>

· 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 Rendering Properties>

· zero or one <DRM Spatial Domain>

· zero or one <DRM Time Constraints Data>

Composed of (two-way metadata) (inherited)

· none

Composed of (two-way metadata)

· 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>

Component of (inherited)

· none

Component of

· one <DRM Attribute Set Table>

Constraints

· Attribute set components

· No attribute conflicts

Notes

none

Class diagram

<DRM Attribute Set>