SIM — Semantic Integrity Marker Protocol v1.0: A Standalone Specification

The SIM Protocol v1.0 defines typed semantic-integrity assertions for canonical web surfaces.

Schema.org can express ordinary relations such as author, work, and organization. SIM is designed for claims such as:

• this entity is a particular type;
• this entity is not a commonly confused type;
• this entity is distinct from a named neighbor;
• a phrase has a declared provenance;
• no affiliation exists with a specified organization;
• this version supersedes an earlier deposit;
• a named heteronym authored the object;
• a compression-survival summary should be preserved;
• a specific URL and DOI anchor the assertion.

The v1.0 tag set includes:

• spxi:isType
• spxi:isNotType
• spxi:distinctFrom
• spxi:phraseProvenance
• spxi:notAffiliatedWith
• spxi:supersedes
• spxi:authoringHeteronym
• spxi:compressionSurvivalSummary
• spxi:canonicalURL
• spxi:licenseDeclaration
• spxi:institutionalAffiliation
• spxi:depositAnchor

Deployment proceeds by identifying the boundary failures, typing each assertion, placing the same claims in page-head metadata and JSON-LD, depositing the inscription, and cross-referencing the governing SPXI deployment.

SIM claims must be falsifiable. “Distinct from X” performs the protocol; “unique and important” does not.

The specification names four major failure modes:

• conflicting assertions across pages;
• missing persistent anchor;
• aspirational rather than falsifiable language;
• marker proliferation without a coherent compression-survival kernel.

Within the Restored Academy registry, SIM is a dependency of SPXI and supports Holographic Kernel inscription and CDI measurement.