Participation

• CURIE: gmeow:Participation
• IRI: https://blackcatinformatics.ca/gmeow/Participation
• Category: class
• Defined by: gmeow:slices/events
• Box roles: TBox role (What is this?)

A reified participation of an entity in an event, in a role, over a period, on some evidence — the same relator idiom as gmeow:NameUsage. Mint one Participation per (event, participant, role) tuple when role / period / confidence / evidence must be recorded; the 80% case uses the flat gmeow:hasParticipant. Perspectival and co-equal: a disputed role is several standpoint-indexed Participations that coexist, none privileged; a withdrawn one is kept with gmeow:displayable false, never deleted.

Structure

Subclass of: gufo:Relator

Practical Pattern

Use gmeow:Participation as a specialized kind of gufo:Relator. Add statement metadata or a standpoint when the assertion needs provenance, confidence, or vantage.

Example Snippets

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

Wedding

• Source: slices/core/events/examples/wedding.ttl
• Examples catalog: open in catalog#example-slices-core-events-examples-wedding

# SPDX-FileCopyrightText: 2026 Blackcat Informatics® Inc. <paudley@blackcatinformatics.ca>
# SPDX-License-Identifier: CC-BY-4.0
#
# Worked example: an event on the four orthogonal axes. A wedding has a
# TYPE (eventTypeMarriage), a temporal placement carried in an EXPLICIT frame
# (P11: the instant is meaningless without its TemporalFrame), and a LOCATION —
# three independent axes. The fourth axis is participation: most attendees ride
# the flat gmeow:hasParticipant (the 80% case), but the principals and the
# officiant are promoted to reified gmeow:Participation relators so their ROLES
# are recorded — the reify-on-demand idiom shared with NameUsage.
@prefix gmeow: <https://blackcatinformatics.ca/gmeow/> .
@prefix ex:    <https://blackcatinformatics.ca/gmeow/examples/events/> .
@prefix rdfs:  <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd:   <http://www.w3.org/2001/XMLSchema#> .

# --- Reified participations: the two principals and the officiant, with roles.
#     A withdrawn or disputed role would coexist as another Participation
#     (displayable false, or standpoint-indexed) — never overwritten (P9/P10).
ex:partAlex a gmeow:Participation ;
    gmeow:participationEvent ex:wedding ;
    gmeow:participationParticipant ex:alex ;
    gmeow:participationRole gmeow:roleParticipantPrincipal .

Blame Deflection

• Source: slices/core/deception/examples/blame-deflection.ttl
• Examples catalog: open in catalog#example-slices-core-deception-examples-blame-deflection

ex:deceiverRole a gmeow:Participation ;
    gmeow:participationEvent ex:coverStory ;
    gmeow:participationParticipant ex:spokesperson ;
    gmeow:participationRole gmeow:roleDeceiver .

External Equivalences

Equivalent or closely aligned targets: prov, sem

Linkages

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

Term Equivalences

Usage Advice

Use when

• Use when a participation must be first-class — when the role, period, confidence, evidence, or standpoint of an entity's part in an event matters (an officiant at a wedding, a disputed witness), the reified half of the gmeow:hasParticipant flat/relator pair.

Avoid when

• Avoid it for the 80% case where an event simply has a participant with no role or period to record — use the flat gmeow:hasParticipant and promote only on demand (the hasMet / InterpersonalRelationship duality); never mint a per-role subclass.

How to use

• Mint one Participation per (event, participant, role) tuple, bind the players with gmeow:participationEvent and gmeow:participationParticipant, add gmeow:participationRole / gmeow:participationInterval / evidence as needed, and index a contested role with gmeow:accordingTo + gmeow:confidence; retract with gmeow:displayable false rather than deletion (Principle 10).

Examples

• ex:p1 a gmeow:Participation; gmeow:participationEvent ex:wedding; gmeow:participationParticipant ex:priest; gmeow:participationRole gmeow:roleOfficiant.

Use For Consumers

• gmeow:consumerAgentMemory
• gmeow:consumerInternalArchive
• gmeow:consumerResearchQueue

Avoid For Consumers

• gmeow:consumerFoafExport
• gmeow:consumerSchemaOrgJsonLd