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Solid Vocabularies

This is a directory of ontologies and vocabularies used by the Solid project.

Table of Contents

Created for Solid

These vocabularies are created for the Solid project, and are contained in this repo.


Contains a snapshot of the previous App Configuration vocabulary for Solid apps. Warning: do not use, the app configuration spec is currently in flux.

Source code: solid-app.ttl


Contains core Solid terms, such as links from a Solid WebID Profile to user account resources, WAC related predicates, and so on.

Canonical prefix URL: http://www.w3.org/ns/solid/terms#

Source code: solid-terms.ttl

Used in Core Solid Spec

These vocabularies are used in required/normative sections of the Solid Spec.


Used for Authorization/Web Access Control of Solid resources.

Canonical prefix URL: http://www.w3.org/ns/auth/acl#


Used in the Public Key Certificates portion of the Solid WebID Profile document.

Canonical prefix URL: http://www.w3.org/ns/auth/cert#


Solid uses the Dublin Core Terms vocabulary in several apps, but specifically in the Certificates section of the WebID Profile document.

Canonical prefix URL: http://purl.org/dc/terms/


The FOAF ontology is used in WebID Profile documents and Web Access Control .acl resources.

Canonical prefix URL: http://xmlns.com/foaf/0.1/


Describes Linked Data Platform terms. Used in the Content Representation and REST API sections of the Solid spec.

Canonical prefix URL: http://www.w3.org/ns/ldp#


The Solid spec uses the Web Ontology Language vocab for specifying Extended Profiles, via owl:sameAs links from the WebID Profile document.

Canonical prefix URL: http://www.w3.org/2002/07/owl#


Used in the Solid WebID Profile spec for discovery of user account resources (to link to Root Storage and Preferences resources).

Canonical prefix URL: http://www.w3.org/ns/pim/space#


Describes terms for POSIX-like files and directory listings. Used in the Solid REST API when listing Containers.

Canonical prefix URL: http://www.w3.org/ns/posix/stat#

Source code: posix-stat.rdf


The Solid spec uses the RDF Schema vocab for specifying Extended Profiles, via rdfs:seeAlso links from the WebID Profile document.

Canonical prefix URL: http://www.w3.org/2000/01/rdf-schema#

Recommended by Solid

These vocabularies and ontologies are recommended by the Solid project for maximum interoperability between apps.


The vCard Ontology is recommended for Contact Management like applications for use with the Solid ecosystem.

Canonical prefix URL: http://www.w3.org/2006/vcard/ns#

Solid Extensions:

  • AddressBook - an RDF class for representing address books that contain contacts.