trust level

• CURIE: gmeow:trustLevel
• IRI: https://blackcatinformatics.ca/gmeow/trustLevel
• Category: property
• Defined by: gmeow:slices/trust
• Box roles: RBox role (What is this?)

The degree of owner-trust expressed: ultimate, full, marginal, or none.

Structure

Property shape: datatype property; gmeow:TrustAssertion -> rdfs:Literal; functional

Practical Pattern

Use gmeow:trustLevel from gmeow:TrustAssertion 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.

Web Of Trust

• Source: slices/core/trust/examples/web-of-trust.ttl
• Examples catalog: open in catalog#example-slices-core-trust-examples-web-of-trust

# SPDX-FileCopyrightText: 2026 Blackcat Informatics® Inc. <paudley@blackcatinformatics.ca>
# SPDX-License-Identifier: CC-BY-4.0
#
# Worked example: the PGP web of trust. Trust is decentralized and
# relational: agents gmeow:holdsKey cryptographic keys; one agent's
# gmeow:Certification signs another's key (a key-signing, binding key↔identity);
# and a gmeow:TrustAssertion records how much a trustor trusts a trustee AS AN
# INTRODUCER (gmeow:trustLevel + gmeow:introducerDepth — how far transitive trust
# may flow). gmeow:endorses is the lightweight, keyless vouch. No central
# authority: trust is asserted pairwise and composed.
@prefix gmeow: <https://blackcatinformatics.ca/gmeow/> .
@prefix ex:    <https://blackcatinformatics.ca/gmeow/examples/trust/> .

# --- Alice trusts Bob as a level-1 introducer (his certifications count for her).
ex:trust a gmeow:TrustAssertion ;
    gmeow:trustor         ex:alice ;
    gmeow:trustee         ex:bob ;
    gmeow:trustLevel      "full" ;
    gmeow:introducerDepth 1 .

Common Companion Terms

gmeow:TrustAssertion

Usage Advice

Use when

• Use to record the degree of owner-trust a trustor expresses in a trustee — the OpenPGP level (ultimate, full, marginal, none) that bounds how much weight an introducer carries.

Avoid when

• Avoid for how carefully a key↔identity binding was checked (that is gmeow:certificationLevel) and avoid treating the level as a global rating — it is one trustor's subjective degree (Principle 9). It is functional on the assertion.

How to use

• Attach one owner-trust level literal to the gmeow:TrustAssertion; the projection-layer metric reads it (with introducer depth/amount) to compute transitive validity, which is never entailed inside the reasoner.

Examples

• ex:t1 gmeow:trustLevel "marginal".