====== P2-REQ-16-3-004 ======

[[dido:99_annexes:annex-d-requirements:part-02:start| Return to Requirements]]

===== Statement =====

A [[dido:99_annexes:annex-b-terms-and-definitions:l:logical_node_role|Logical Node Role]] SHALL identify a platform-independent responsibility assigned to or performed by a [[dido:99_annexes:annex-b-terms-and-definitions:l:logical_node|Logical Node]].

===== Source =====

Part 2, Section 16.3: Logical Node Requirements.

===== Rationale =====

Logical Node Roles separate responsibilities from the Logical Nodes that perform them. This separation allows multiple Logical Nodes to perform the same role, a single Logical Node to perform multiple roles, and Domain Logical Profiles to specialize responsibilities without redefining the Logical Node concept.

===== Applies To =====

This requirement applies to the definition, review, maintenance, and interpretation of Logical Node Roles.

It applies specifically to:

  * Logical Node Roles;
  * Logical Nodes;
  * Responsibility assignment; and
  * Domain Logical Profiles.

===== Verification =====

Verification SHALL confirm that each Logical Node Role identifies a platform-independent responsibility.

Verification activities should include review checks confirming that:

  * Logical Node Roles are explicitly defined;
  * responsibilities are assigned independently of implementation technologies;
  * Logical Nodes perform one or more Logical Node Roles; and
  * Domain Logical Profiles preserve the meaning of inherited Logical Node Roles.

===== Traceability =====

This requirement supports traceability between Logical Node Roles and the Logical Nodes that perform them.

Related requirement identifiers:

  * [[dido:99_annexes:annex-d-requirements:part-02:p2-req-16-3-001]]
  * [[dido:99_annexes:annex-d-requirements:part-02:p2-req-16-3-003]]
  * [[dido:99_annexes:annex-d-requirements:part-02:p2-req-16-3-005]]

Related source section:

  * [[fxdemo:02-part:16-logical-requirements:16-3-logical-node-requirements:start]]

===== Status =====

Draft

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