Open standard. Closed runtime. Governed certification.
This policy defines how Sigma marks, certification language, badges, compatibility claims, self-declaration, and official conformance registry status may be used.
The Sigma Runtime Standard public specification layer may be cited, discussed, and independently implemented under the applicable public specification terms. Sigma marks and official certification identify reviewed or authorized Sigma surfaces and are governed separately.
Protected marks include, without limitation:
The protected Sigma symbol is ∿ (Unicode U+223F, Sine Wave). ASCII tilde (U+007E) is not the Sigma mark.
The terms SRS and SRIP may be used descriptively to refer to the public specification and improvement proposal process.
They may not be used to imply official endorsement, certification, partnership, or product identity without permission.
Descriptive use should be truthful, specific, and version-aware. It should identify the SRS/SRIP versions referenced and avoid implying that Sigma Stratum reviewed, approved, certified, or operates the third-party implementation.
Use of Sigma marks as product identity, service identity, certification identity, endorsement, or official compatibility claim requires written permission.
Without written permission, do not:
∿ as a product badge, certification mark, endorsement mark, or official compatibility signal;A third-party implementation may truthfully state that it is "built with reference to SRS" or "self-declared against SRS requirements" if it follows the public self-declaration rules.
Compatibility claims must not imply official certification, endorsement, partnership, or approval unless the implementation has completed the official certification process and is listed in the official Sigma conformance registry.
Self-declaration is a third-party statement that an implementation targets or evaluates itself against specific SRS/SRIP requirements.
A self-declaration must identify the SRS/SRIP version, claimed conformance level, supported SRIPs, unsupported SRIPs, known deviations, and evidence artifacts.
Self-declared conformance is not official certification and must not be presented as endorsement, approval, partnership, or certification by Sigma Stratum.
Only implementations reviewed, approved, and listed by Sigma Stratum may use "Sigma Certified", "Sigma Runtime Certified", official certification badges, the ∿ certification mark, or language implying endorsement by Sigma Stratum.
Official certification requires a defined review scope, evidence review, version pinning, and registry listing. Certification terms, fees, renewal rules, suspension rules, and revocation rules may be defined by separate certification or commercial terms.
Official Sigma certification badges are permissioned marks.
Badges may be used only for the certified implementation, version, scope, and certification level listed in the official Sigma conformance registry. Badge use must not be transferred to unrelated products, services, versions, forks, or deployments.
The official Sigma conformance registry is the authoritative list of implementations that have completed official certification.
Public beta, experimental, self-declared, or third-party implementations must not be interpreted as officially certified unless listed in the official registry.
Until the conformance registry is published, no third-party implementation should claim official Sigma certification.
Misleading claims include, without limitation:
∿ as a product badge or certification mark without permission;Sigma Stratum may request correction, clarification, takedown, badge removal, attribution correction, or registry-status correction for misleading marks use, certification claims, compatibility claims, or endorsement claims.
Correction requests should be specific, evidence-based, and tied to the relevant marks, certification, conformance, attribution, or licensing policy.
For marks, certification, compatibility claims, badge use, self-declaration, or conformance registry questions:
Sigma Stratum Research Group
Email: legal@sigmastratum.org
Website: https://sigmastratum.org