====== GPR-009 — Context-Independent Functional Factoring ======

[[public:00-sip-ra:99-annexes:annex-c-requirements:start|Go to Annex C: Requirements]]

===== Statement =====

The Submission SHALL separate functionality reusable across multiple contexts from functionality specific to an individual context.

===== Requirement Level =====

Mandatory

===== Rationale =====

Define functionality that applies across multiple contexts once and reuse it. Repeating equivalent functionality within context-specific models creates duplication, increases maintenance effort, and allows inconsistent definitions to develop.

Separating reusable functionality from context-specific functionality establishes a common architectural foundation while permitting specialization for individual Domains, platforms, jurisdictions, security environments, or operational contexts.

===== Evaluation Criteria =====

A conforming Submission demonstrates that:

  - Contexts addressed by the specification are identified
  - Functionality shared across multiple contexts is identified
  - Shared functionality is defined independently of individual contexts
  - Context-specific functionality is distinguishable from shared functionality
  - Context-specific models reuse or specialize applicable shared functionality
  - Equivalent functionality is not independently redefined in multiple contexts
  - Relationships between shared and context-specific functionality are represented
  - Constraints introduced by a particular context are explicitly identified
  - Changes to shared functionality can be distinguished from changes to a context-specific specialization
  - Reuse does not alter the normative meaning of the shared functionality

===== Referenced By =====

{{backlinks>public:00-sip-ra:99-annexes:annex-c-requirements:gpr-009-context-independent-functional-factoring}}

===== Notes for Editors =====

This requirement does not prohibit context-specific specialization. It requires separating reusable functionality from the additional functionality or constraints introduced by a particular context.

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