The SEDRIS Data Representation Model
APPENDIX B - Constraints
Attribute Set Table Size

Definition

For a given <Attribute Set Table Group> instance G with table_size = k, each <Attribute Set Table> component T of G shall have k <Attribute Set> components.

For any given T within G, if regular = SE_TRUE, each of the k <Attribute Set> components of T shall contain the same number of SEDRIS objects, and these SEDRIS objects shall belong to the same classes. If regular = SE_FALSE for T, no such constraint holds.

Note that G may have both regular and non-regular <Attribute Set Table> components, and that even if all <Attribute Set Table> components of G are regular, there is no constraint that they are all regular in the same way.

Rationale

This is a requirement in order to allow the <Attribute Set Table> instances within an <Attribute Set Table Group> to be interchangeable.

Example

  1. Consider an <Attribute Set Table Group> instance that contains three <Attribute Set Table> components: one for an Out-The-Window view, one for a RADAR view, and one for an Infra-Red view. All three <Attribute Set Table> instances contain 234 <Attribute Set> instances. Entry 234 in each <Attribute Set Table> contains an <Attribute Set> for the representation of "steel" in the three different domains.

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Last updated: May 15, 2003 Copyright © 2003 SEDRIS™