content digest

A content hash of an object's bytes (e.g. "blake3:…", "sha256:…", "git:…") — the reliable identity by content (two objects with the same bytes are the same object, regardless of path, name, or mtime). Domain-free: applies to creative works, source files, commits, distributions, and any other content-addressable artifact. Not functional: an object may carry digests under several algorithms.

Structure

Property shape: datatype property; ? -> rdfs:Literal

Practical Pattern

Use gmeow:contentDigest from ? to rdfs:Literal when the relationship itself belongs in the native GMEOW graph.

Example Snippets

These snippets are generated from canonical slice examples and trimmed to the Turtle blocks where this term appears.

Imported Record

# SPDX-FileCopyrightText: 2026 Blackcat Informatics® Inc. <paudley@blackcatinformatics.ca>
# SPDX-License-Identifier: CC-BY-4.0
#
# Worked example: pinning an imported source. The sources slice is the
# "where did this byte-stream come from" layer: gmeow:sourceLocation (where it was
# read from), gmeow:sourceModifiedAt (the source's own last-modified time, not the
# import time), and gmeow:contentDigest (a content hash so later re-imports can
# detect whether the bytes changed). Together they make an imported artifact
# re-fetchable and tamper-evident — the substrate the provenance slice builds its
# wasDerivedFrom lineage on.
@prefix gmeow: <https://blackcatinformatics.ca/gmeow/> .
@prefix ex:    <https://blackcatinformatics.ca/gmeow/examples/sources/> .
@prefix xsd:   <http://www.w3.org/2001/XMLSchema#> .

ex:report a gmeow:CreativeWork ;
    gmeow:title            "Q3 2026 Financial Report"@en ;
    gmeow:sourceLocation   "/imports/finance/q3-2026.pdf" ;
    gmeow:sourceModifiedAt "2026-09-30T17:00:00Z"^^xsd:dateTime ;
    gmeow:contentDigest    "blake3:5f8d1e2a9c4b7d0e3f6a1b8c5d2e9f0a3b6c7d4e1f8a2b5c9d0e3f6a7b4c1d8e" .

Agent Trajectory

@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#> .



ex:call-7-1 a gmeow:ToolCall ;
    rdfs:label "turn 7, call 1: search"@en ;
    gmeow:calledByInvocation ex:invocation-7 ;
    gmeow:usedTool ex:webSearch ;
    gmeow:toolArguments "{\"query\": \"GTS deterministic encoding spec\"}" ;
    # Large result: the digest IS the value (gmeow:contentDigest convention).
    gmeow:toolResult "blake3:9f64a747e1b97f131fabb6b447296c9b6f0201e79fb3c5356e6c77e89b6a806a" ;
    gmeow:atTime "2026-06-12T17:03:11Z"^^xsd:dateTime ;
    gmeow:eventTemporalFrame gmeow:temporalFrameUTCGregorian .

Projects To

Profile External Targets
codemeta codemeta
dcat rdf, spdx

Linkages

Generated from the canonical mapping DSL. SSSOM files are the generated public interchange form for term equivalences.

Projection Coverage

Source Kind Profile Predicate/Relation Target Evidence
gmeow:contentDigest projection codemeta projects to / = codemeta:identifier gmeow:mapCodeMetaIdentifier; lossy: digest algorithm, multiple digests; only the string value survives
gmeow:contentDigest projection dcat projects to / <= rdf:type, spdx:Checksum, spdx:checksum, spdx:checksumValue gmeow:mapDcatChecksum; confidence 0.85; lossy: the algorithm prefix stays inline in spdx:checksumValue (no spdx:algorithm split)

Usage Advice

Use when

Avoid when

How to use

Scope notes

Examples