Chapter 36. NAF Tool

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  4. 4. Logical Specifications Viewpoints
  5. L8 – Logical Constraints

L8 – Logical Constraints

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The L8 Viewpoint is used to constrain the logical architecture without forcing a particular solution. L8 is used for rules which are not expressed as behavioral models, interactions or measures of effectiveness, i.e. they are textual statements of requirements that constrain the architecture.

Usage

The intended usage of the L8 includes:

  • Definition of business rules.
  • Identification of operational constraints.

Creating a Logical Constraints table

To create a Logical Constraints table:

  1. Click on Logical Constraints in the Action Artifact area, and then select Create New Diagram.
  2. Type the diagram name and press Enter.
  3. This opens a table where you can create and manage logical constraints. Click on New Constraint above the table to create a new row of logical constraint..
  4. Click on the cell of the Constrained Elements column and select the elements to be constrained (i.e. OperationalActivity, OperationalPerformer, KnownResource, OperationalArchitecture, InformationElement, OperationalExhange).
  5. Enter the constraint in the Rule Specification cell.

NATO NAF Example: Logical Constraints