page main entity

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

The principal subject a web page is primarily about — the one entity it represents (a person's profile page, an organization's about page). A functional specialisation of gmeow:isAbout (a page has at most one principal subject, though it may mention many). When the principal subject is an Agent the page is inferred a gmeow:ProfilePage.

Structure

Property shape: object property; gmeow:WebPage -> gmeow:Entity; functional Sub-property of: gmeow:isAbout

Practical Pattern

Use gmeow:pagePrincipalSubject from gmeow:WebPage to gmeow:Entity 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 Presence

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

# SPDX-FileCopyrightText: 2026 Blackcat Informatics® Inc. <paudley@blackcatinformatics.ca>
# SPDX-License-Identifier: CC-BY-4.0
#
# Worked example: a web presence on the WEMI spine. A WebSite and
# its WebPages are concrete gmeow:Manifestations — so each embodies an Expression
# that realizes a Work, the same four-tier backing every published artifact
# carries. Pages belong to the site via gmeow:pageOfSite (⊑ partOf). The about
# page names a person as its gmeow:pagePrincipalSubject (⊑ isAbout), which makes
# it a gmeow:ProfilePage by INFERENCE — ProfilePage is a defined class (any
# WebPage whose principal subject is an Agent), so no manual typing is needed.
@prefix gmeow: <https://blackcatinformatics.ca/gmeow/> .
@prefix ex:    <https://blackcatinformatics.ca/gmeow/examples/documents/> .

# --- The about page: its principal subject is a person, so it IS a ProfilePage
#     (≡ WebPage ⊓ ∃pagePrincipalSubject.Agent) without being typed as one.
ex:aboutMara a gmeow:WebPage ;
    gmeow:pageOfSite ex:site ;
    gmeow:pagePrincipalSubject ex:mara ;
    gmeow:embodies ex:siteContent .

Common Companion Terms

gmeow:isAbout, gmeow:WebPage, gmeow:Entity

Projects To

External Equivalences

Equivalent or closely aligned targets: schema

Linkages

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

Term Equivalences

Projection Coverage

Usage Advice

Use when

• Use to name the one entity a web page is primarily about — the subject of a profile or about page; functional, a page has at most one principal subject.

Avoid when

• Avoid it for every entity merely mentioned on the page (use the broader gmeow:isAbout for incidental mentions) and avoid asserting two principal subjects (it is functional).

How to use

• Point the gmeow:WebPage at its principal subject via gmeow:pagePrincipalSubject (a functional gmeow:isAbout specialization); when the subject is a gmeow:Agent the page is automatically inferred a gmeow:ProfilePage and projects to schema:mainEntityOfPage.

Examples

• ex:aboutPage gmeow:pagePrincipalSubject ex:lillith.