RDF · Ontologies · Knowledge Graphs

Knowledge Graphs for Document and Network Data

We design ontologies and build RDF databases that make documents, people, and the relationships between them queryable — for document management platforms, social networks, and the integrators who deliver them.

When the relationships matter more than the rows, the model has to be a graph.

Some Data Does Not Fit in Tables

Documents reference other documents. People belong to groups, own content, and connect to each other. Classifications change. Relational schemas absorb this badly.

RDF represents data as statements about things and the links between them, and an ontology gives those statements a shared, explicit meaning. The result is a model that can grow without a migration for every new relationship — and that several systems can agree on.

Document Management

Metadata · Provenance · Retention

Documents carry authors, versions, classifications, retention rules, and references to each other. Modeled as a graph, that metadata is queryable across repositories instead of trapped inside each one.

Social & Organizational Networks

People · Groups · Relationships

Who is connected to whom, who belongs to what, and who can see which content. Paths, reachability, and visibility are natural graph queries and painful chains of joins.

Integration Across Silos

Shared Vocabulary

A common ontology lets separate systems describe the same entities in the same terms. Records link by identifier, without forcing every source into a single schema first.

Access & Policy Reasoning

Rules · Inference

Permissions and classifications that follow from relationships — membership, ownership, containment — are derived from the graph rather than maintained by hand in every application.

Search & Discovery

Entities · Taxonomies

Controlled vocabularies and entity links turn keyword search into finding things by what they are and what they relate to — the same concept under every name it goes by.

From Ontology to Production Graph

A knowledge graph is mostly not the triple store. It is the model behind it, the pipelines that populate it from source systems, and the validation that keeps it trustworthy — correctly, repeatably, and at scale.

Ontology & Vocabulary Design

  • OWL and RDFS modeling of domain concepts
  • SKOS taxonomies and controlled vocabularies
  • Reuse of established vocabularies before inventing new ones
  • Versioning and governance for evolving models

RDF Database Implementation

  • Triple store selection, deployment, and tuning
  • SPARQL query and update design
  • Named graphs for provenance and partitioning
  • Reasoning and inference configuration

Ingestion & Mapping Pipelines

  • Relational and document sources to RDF (R2RML, RML)
  • JSON-LD at API boundaries
  • Entity resolution and identifier linking
  • Orchestrated, replayable loads into the graph

Validation & Applications

  • SHACL shapes for data quality constraints
  • Document metadata and lineage services
  • Social graph and relationship query APIs
  • Graph-backed search and navigation

The W3C Semantic Web Stack and Its Common Vocabularies

Core Standards

  • RDF 1.1 and RDF Schema
  • OWL 2 Web Ontology Language
  • SPARQL 1.1 Query and Update
  • SHACL — shapes and constraints

Vocabularies

  • Dublin Core and DCAT — document and dataset metadata
  • PROV-O — provenance and lineage
  • SKOS — taxonomies and thesauri
  • FOAF, SIOC, and Activity Streams — people and social content

Formats & Tooling

  • Turtle, JSON-LD, and N-Quads serializations
  • R2RML and RML mapping languages
  • Apache Jena and Eclipse RDF4J
  • Standards-compliant triple stores, open source and commercial

This Is a Data Modeling Problem First

Knowledge graph projects fail in the model and the pipelines, not in the database. An ontology that tries to describe everything never ships; one that is too loose produces a graph nobody can query with confidence. We keep the model small, validated, and tied to the questions it has to answer.

  • Ontologies scoped to real queries, not to completeness
  • Validated data, so the graph can be trusted
  • Deterministic, replayable loads with provenance by source
  • Comfortable operating inside layered vendor chains
  • Senior capability, without heavy onboarding

How We Engage

We work directly with product and data teams or subcontract under prime system integrators. Whether you need an ontology designed, an existing graph stabilized, or semantic capability added to a document or social platform, we integrate quickly and focus on a working graph that answers real questions.

When documents, people, and systems are connected
in ways your database cannot express,
let's talk about your data model.

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