Linked Data

This site is more than pages — it is a published knowledge graph: entities and their relationships described as RDF triples, offered in several downloadable, queryable serializations. This page is built around Turtle (/index.ttl), the most readable form; JSON-LD and N-Triples are the same triples in another syntax.

Serializations & access points

One graph, the same triples, in forms suited to each use:

Form	Best for
`/index.ttl` — Turtle	The readable canonical view; what this page's examples use.
`/index.jsonld` — JSON-LD	The web-native default (embeds in HTML, consumed by JSON tooling); also the source the graph is generated from.
`/index.nt` — N-Triples	One triple per line: bulk loading, `diff`, streaming, and canonical hashing (echoing the Trust & Provenance page).
`/sparql`	Query the graph live with SPARQL.
`/.well-known/void.ttl` — VoID	Dataset self-description (size, vocabularies, access).

The three serializations are isomorphic — exactly the same triples, different syntax. Content negotiation by Accept header also works on any page URL. Every machine-discovery resource is listed in the discovery catalog.

What it's good for

Query it with SPARQL instead of scraping pages.
Reconcile entities — grounded with Wikidata QIDs (and ORCID, DBLP…) so they align with external datasets.
Reuse the whole dataset — licensed Creative Commons BY-NC-SA CAv2.5, downloadable and redistributable.
Validate it against SHACL and ShEx shapes (below).
Feed agents — the same graph is exposed to AI clients via MCP and llms.txt.

Key sections of the graph

Every entity is identified by an IRI fragment (#…) in the root Turtle document. The company node is #bii and the person node is #paudley.

Expertise taxonomy (SKOS): 31 skos:Concept nodes under the #kw-scheme scheme, labelled in en/fr/zh, Wikidata-grounded and aligned to ACM, IEEE SWEBOK, LCSH, ESCO, EuroVoc and more.
Publications & patents: 3 publications and 2 patents (BIBO/BIBFRAME, with DOIs and sameAs).
Services & offers: localized service offerings (schema:Service / Offer).
Open-source projects: described with DOAP (repository, licence, language).
Trademarks: CIPO-registered marks as Brand nodes carrying ODRL usage policies.

What one SKOS concept looks like in Turtle:

@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix owl:  <http://www.w3.org/2002/07/owl#> .
@prefix wd:   <http://www.wikidata.org/entity/> .
@prefix lcsh: <http://id.loc.gov/authorities/subjects/> .

<#concept-semantic-web> a skos:Concept ;
    skos:inScheme    <#kw-scheme> ;
    skos:prefLabel   "Semantic Web"@en, "Web sémantique"@fr, "语义网"@zh ;
    owl:sameAs       wd:Q54837 ;
    skos:closeMatch  lcsh:sh2002000569 .

Ontologies overview

The graph reuses established standard vocabularies, grouped here by purpose:

Vocabulary	Used here for
Entities & relationships
Schema.org `schema:`	`Person` · `Organization` · `CreativeWork` · `Place` · `Service`/`Offer`
FOAF `foaf:`	`foaf:knows` · `account` · `made`
W3C ORG `org:`	`Membership` · `Site` · `hasRole`
vCard `vcard:`	`hasAddress` · `hasEmail` · `hasTelephone`
Knowledge organization & trust
SKOS `skos:`	`ConceptScheme` · `prefLabel` (en/fr/zh) · `broader` · `closeMatch`
MADS/RDF `mads:`	`authoritativeLabel` · `hasCloseExternalAuthority`
Web of Trust `wot:`	`hasKey` · `fingerprint` · `assurance` (OpenPGP key binding)
Scholarship & publications
BIBO `bibo:`	`AcademicArticle` · `Patent` · `doi`
BIBFRAME `bf:`	`Work` · `Title`
Dublin Core Terms `dcterms:`	`title` · `creator` · `modified` · `license` · `rights`
Software projects
DOAP `doap:`	`Project` · `repository` · `programming-language` · `license`
Provenance & governance
PROV-O `prov:`	`Activity` · `wasGeneratedBy` · `wasAttributedTo`
ODRL `odrl:`	`Policy` · `Offer` · `permission`/`prohibition`
DPV `dpv:`	`PrivacyNotice` · `hasDataController`
Place & time
GeoSPARQL `geo:`	`Feature` · `Geometry` · `asWKT`
OWL-Time `time:`	`Instant` · `inXSDDateTime`
Social & genealogy
SIOC `sioc:`	`Post` · `UserAccount` · `Container`
GEDCOM/RDF `gedcom:`	`Individual` · `Family` · `childIn`
Relationship `rel:`	`childOf` · `spouseOf` · `siblingOf`
Shapes, validation & dataset
SHACL `sh:`	constraint shapes (`/.well-known/shacl.ttl`)
ShEx	shape expressions (`/.well-known/shex.shex`)
VoID `void:`	dataset self-description
SPARQL-SD `sd:`	endpoint description
RDF core
RDF · RDFS · OWL	`rdf:type` · `rdfs:label` · `owl:sameAs`
External alignment & grounding
Linked via `owl:sameAs` / `skos:closeMatch` (targets, not modelling vocabularies): Wikidata · DBpedia · LCSH · ACM CCS · IEEE SWEBOK · EuroVoc · ESCO · OpenAlex · UNESCO Thesaurus · GB/T · GeoNames · Getty TGN

Shapes, validation & self-description

The graph is constrained and self-describing — its structure is declared in two standard shape languages, with dataset metadata:

/.well-known/shacl.ttl — SHACL constraint shapes
/.well-known/shex.shex — ShEx shape expressions
/.well-known/void.ttl — VoID dataset description

Example query — every concept with its Wikidata grounding:

PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
PREFIX owl:  <http://www.w3.org/2002/07/owl#>
SELECT ?concept ?label ?wikidata WHERE {
  ?concept a skos:Concept ; skos:prefLabel ?label .
  OPTIONAL { ?concept owl:sameAs ?wikidata }
}