====== GPR-007 — Reuse of Existing Standards ======

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

===== Statement =====

The Submission SHALL reuse applicable existing OMG and other recognized standards rather than define new models that provide equivalent capabilities.

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

Mandatory

===== Rationale =====

Reusing established standards promotes interoperability, consistency, implementation reuse, and compatibility with the existing standards ecosystem. It also reduces the risk of introducing overlapping concepts, conflicting definitions, and competing conformance requirements.

A new model is appropriate when no applicable existing standard provides the required capability. In that case, the Submission must distinguish the unmet architectural need from capabilities already standardized elsewhere.

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

A conforming Submission demonstrates that:

  - Existing OMG specifications relevant to the proposed capabilities are identified
  - Other applicable recognized standards are identified
  - Capabilities available from those standards are evaluated
  - Applicable existing models and constructs are reused
  - Reused standards and their applicable versions are referenced
  - Relationships between reused standards and newly defined models are described
  - New models do not duplicate capabilities already provided by an applicable standard
  - Any decision not to reuse an apparently applicable standard is explained
  - Each new model addresses an identified capability not adequately provided by an applicable existing standard
  - Extensions to reused standards are distinguished from their normative definitions
  - Conformance responsibilities belonging to reused standards remain identifiable

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

{{backlinks>public:00-sip-ra:99-annexes:annex-c-requirements:gpr-007-reuse-of-existing-standards}}

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

The qualification “applicable” avoids requiring use of a standard that does not address the architectural need. “Equivalent capabilities” is used instead of “similar functionality” to provide a more objective basis for evaluation.

GPR-007 does not prohibit new models. When a new model is necessary, the Submission must identify the unmet need and demonstrate that the model does not duplicate an applicable existing standard.

SIP-026 preserves existing OMG specifications. SIP-034 preserves existing transport and exchange constructs. SIP-038 prohibits duplicating capabilities standardized by existing information-exchange, Interoperability, and semantic-federation specifications.

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