Palantir Foundry Ontology
Palantir Foundry is a proprietary, vendor-controlled platform, and its Ontology is the closest commercial analogue to an ontology-based knowledge layer — objects, links between them, and actions over them — held firmly inside the vendor's product rather than published as a standard.
What it is
The Foundry Ontology is a proprietary, vendor-controlled artefact: it is defined, hosted and revised by Palantir, and no other vendor implements it. Palantir's documentation describes it as an operational layer sitting on top of the digital assets integrated into the platform — datasets, virtual tables and models — and connecting them to their counterparts in the world, from plants and equipment to customer orders and financial transactions.
What it gives the knowledge layer
Of the commercial platforms on this site, this is the nearest thing to a working ontology layer, because it carries structure and the ability to act on it. The documentation separates the semantic elements — object types, properties and links — from the kinetic ones: action types and functions. An object type is the schema definition of a real-world entity, an object is a single instance of it, and links relate instances. An action type defines the set of changes a user may apply to objects, property values and links at once, with parameters, rules and validation attached, so an agent can be handed a modelled entity and a permitted transaction over it instead of a passage of text. Interfaces describe the shape of an object type so that several types sharing that shape can be treated alike, which is how a capability is written once and applied across entity types.
Where it is documented
Palantir documents the Ontology on its own site at palantir.com/docs, under an Ontology building section with separate pages for object and link types, action types and functions, interfaces, and design guidance. The pages are publicly readable and written by the vendor. There is no equivalent of a W3C Recommendation here: no normative document, no implementation report, and no route for an outside party to propose a change to the model.
What it does not solve
You cannot take the ontology with you. Its definitions live inside Foundry and are read back through Foundry's tools and applications, so the meaning of the model is held by the platform rather than by a document you own — a deliberate contrast with RDF, a vendor-neutral data model, and OWL, an ontology language, both specified so that any system may implement them. A model built in Foundry is not portable, not inspectable by an unrelated tool, and not comparable with a model of the same domain built elsewhere. The platform gives you a strong place to work with modelled meaning; it does not give you a way to hand that meaning to someone who does not buy the platform.
FAQ
No. It is a proprietary artefact of the Foundry platform. The documentation is publicly readable, but the model is defined, hosted and revised by the vendor, and no other system implements it.
RDF and OWL are W3C Recommendations: a data model and an ontology language that any system may implement and exchange. The Foundry Ontology is a product feature tied to Foundry's own data assets and applications.
Yes. Action types define the changes that may be applied to objects, property values and links, with parameters, rules and validation, so an agent can be constrained to permitted transactions on modelled entities rather than to free-form edits.
It is a graph-shaped entity model, and the documentation uses objects, properties and links as its vocabulary. What it does not provide is a graph serialisation or query language an unrelated system can consume, so the shape is a description rather than an interchange format.
Sources
- Palantir documentation — Ontology, overview — the Ontology as an operational layer over datasets, virtual tables and models; semantic elements (object types, properties, links) and kinetic elements (action types, functions); interfaces.
- Palantir documentation — Action types, overview — an action type as the definition of the changes that may be applied to objects, property values and links at once, including parameters, rules, validation and side effects.
- Palantir documentation — the vendor's documentation portal, covering the Ontology building section and the rest of the platform's reference material.