GMEOW GTS Transport Module

• IRI: https://blackcatinformatics.ca/gmeow/slices/gts
• Tier: core
• Group: core

What This Slice Covers

This slice owns 38 terms and contributes 3 mapping or projection rows. Use it when its terms match the native fact you want to preserve; use the linkage tables to see how those facts leave GMEOW for consumer vocabularies.

Dependencies

• gmeow:slices/attestation
• gmeow:slices/creative-works
• gmeow:slices/kernel
• gmeow:slices/provenance
• gmeow:slices/versions

Consumers

• Describing and dogfooding GTS transport artifacts: packages, segments, profiles, chain heads, opaque frames, codecs, and compaction lineage (GTS transport design, docs/GTS-SPEC.md).

Local Map

Examples

Dist Package

• Source: slices/core/gts/examples/dist-package.ttl
• GMEOW terms: gmeow:Agent, gmeow:Expression, gmeow:GTSDocument, gmeow:GTSSegment, gmeow:OpaqueFrame, gmeow:Work, gmeow:codecZstd, gmeow:contentDigest, gmeow:embodies, gmeow:gtsHeadId
• External prefixes: xsd

# SPDX-FileCopyrightText: 2026 Blackcat Informatics® Inc. <paudley@blackcatinformatics.ca>
# SPDX-License-Identifier: CC-BY-4.0
# Worked example: a two-segment GTS distribution package described
# in GMEOW's own transport vocabulary — the dogfood loop closed. Validates
# in `make validate` against the merged ontology + SHACL (the segment
# shapes demand the composite-identity parts: head, index, profile).

@prefix gmeow: <https://blackcatinformatics.ca/gmeow/> .
@prefix ex:    <https://blackcatinformatics.ca/gmeow/examples/> .
@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd:   <http://www.w3.org/2001/XMLSchema#> .

# The full WEMI spine the shapes demand: Work ← realizes ← Expression
# ← embodies ← Manifestation (the GTS document and its segments).
ex:gmeow-ontology-work-001
    a gmeow:Work ;
    rdfs:label "the GMEOW ontology"@en .

ex:gmeow-ontology-expression-001
    a gmeow:Expression ;
    rdfs:label "the GMEOW ontology, v0.1.0 statement-complete expression"@en ;
    gmeow:realizes ex:gmeow-ontology-work-001 ;
    # P11: an expression's content lives in a reference system — here the
    # (English-labelled) vocabulary expression of the ontology.
    gmeow:hasReferenceFrame gmeow:referenceFrameEnglish .

ex:gts-dist-package-001
    a gmeow:GTSDocument ;
    rdfs:label "gmeow.gts — the dist snapshot, with a music extension appended"@en ;
    gmeow:embodies ex:gmeow-ontology-expression-001 ;
    gmeow:contentDigest "blake3:0e2f4b8a3c1d5e7f9a0b2c4d6e8f0a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f" .

ex:gts-dist-segment-core
    a gmeow:GTSSegment ;
    rdfs:label "core dist segment"@en ;
    gmeow:gtsSegmentOf ex:gts-dist-package-001 ;
    gmeow:embodies ex:gmeow-ontology-expression-001 ;
    gmeow:gtsSegmentIndex "0"^^xsd:nonNegativeInteger ;
    gmeow:gtsHeadId "blake3:929d046b2300eb09424f2d46b07fb793ad97ddde5e9fdb25ebefe245e8da8be8" ;
    gmeow:gtsProfile gmeow:gtsProfileDist ;
    gmeow:usesTransformCodec gmeow:codecZstd .

ex:gts-dist-segment-music
    a gmeow:GTSSegment ;
    rdfs:label "appended music-extension segment"@en ;
    gmeow:gtsSegmentOf ex:gts-dist-package-001 ;
    gmeow:embodies ex:gmeow-ontology-expression-001 ;
    gmeow:gtsSegmentIndex "1"^^xsd:nonNegativeInteger ;
    gmeow:gtsHeadId "blake3:167704cc2c533090b63ff3bf38b4fcff2bb70b33f996aa22f53025044e310ee8" ;
    gmeow:gtsProfile gmeow:gtsProfileGeneric ;
    gmeow:usesTransformCodec gmeow:codecZstd .

# A sealed frame: opacity is vantage-relative — transparent to its recipient.
ex:gts-opaque-frame-001
    a gmeow:OpaqueFrame ;
    rdfs:label "sealed evidence attachment"@en ;
    gmeow:opaqueFrameIn ex:gts-dist-segment-core ;
    gmeow:opacityReason gmeow:opacityMissingKey ;
    gmeow:sealedRecipient ex:agent-archivist-001 .

ex:agent-archivist-001
    a gmeow:Agent ;
    rdfs:label "the archivist"@en .

Terms

Classes

Properties

Individuals

Linkages

• Rows: 3
• Projection profiles: -
• External vocabularies: dcat, prov

Guide

GTS Transport Module

GMEOW describing its own transport (GTS transport design, docs/GTS-SPEC.md): a GTS file as a first-class entity — its segments, profiles, chain heads, transform codecs, opaque frames, and compaction lineage. Term-level documentation lives in module.ttl; this note carries the doctrine.

Transport claims vs content claims

GTS gives TRANSPORT claims; GMEOW gives CONTENT claims. A frame signature or head commitment is a gmeow:Attestation whose attestedSubject is the gmeow:GTSSegment: it proves bytes, order, and signer key control — never the truth of the carried statements. Content claims ("this is true, signed by Bob") are statement-level machinery (standpoint, attestation over claims) riding as ordinary quads — opaque cargo to the transport, and therefore invariant under transport operations by construction.

The corollary is gmeow:GTSCompaction: a rewrite re-authors only the ordering. Content claims survive untouched; transport claims over the source chain become detached evidence about the source document, cited through the compaction's wasDerivedFrom lineage and the source's gtsHeadIds. Evidence-profile documents warn on compaction (see shapes.ttl); sealing the source verbatim as a nested GTS blob (spec §12.1) preserves its attestation intact.

Identity

Three identities, three properties, no overlap: gmeow:contentDigest (sources) is byte-exact identity of a file or blob; gmeow:gtsHeadId (⊑ gmeow:versionFingerprint) is the chain head that transitively commits to a segment's history; the document's composite identity is the ordered list of its segments' heads (gtsSegmentIndex order).

Reuse map (no parallel mechanisms)

Opacity is vantage-relative epistemic state (Principle 9): the same sealed frame is transparent to its sealedRecipients.

Terms

gmeow:GTSDocument · gmeow:GTSSegment · gmeow:gtsSegment · gmeow:gtsSegmentOf · gmeow:gtsSegmentIndex

A GTS file as a first-class entity and the segments that compose it. gtsSegment (with its inverse gtsSegmentOf) relates a document to its segments, and gtsSegmentIndex fixes their order — the document's composite identity is the ordered list of its segments' chain heads.

gmeow:gtsHeadId · gmeow:GTSProfile · gmeow:gtsProfile

The chain head (gtsHeadId, ⊑ gmeow:versionFingerprint) that transitively commits to a segment's history; and the transport profile (GTSProfile) a document declares, attached by gtsProfile — evidence-profile documents, for instance, warn on compaction.

gmeow:GTSCompaction

A rewrite that re-authors only segment ordering: content claims survive untouched, while transport claims over the source chain become detached evidence cited through the compaction's wasDerivedFrom lineage.

gmeow:TransformCodec · gmeow:usesTransformCodec · gmeow:CodecClass · gmeow:codecClass

A transform codec applied to bytes in transit, attached by usesTransformCodec; CodecClass is the open value vocabulary of codec families a codec belongs to via codecClass.

gmeow:OpaqueFrame · gmeow:opaqueFrameIn · gmeow:sealedRecipient · gmeow:OpacityReason · gmeow:opacityReason

A frame whose payload is sealed: opaqueFrameIn situates it within a document, sealedRecipient names the vantages to which it is transparent, and opacityReason (an OpacityReason value) records why it is opaque — opacity being vantage-relative epistemic state (Principle 9).