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oxp-ontology

Multi-Agent System (MAS) Execution Ontology — RDF/OWL vocabulary and Python helpers for describing, validating, and querying multi-agent system telemetry as a knowledge graph.

Part of the Observe and eXplain Platform.

What's included

Five Turtle ontologies under a single mas: namespace:

Ontology Covers
mas Core schema: MAS, Agent, LLM, Tool, Processing, their execution instances, and the normalized State/Transition trajectory
metrics Metric/MetricResult definitions and observations
semantic Embedding layer linking trajectory nodes to vector embeddings
analysis Group-scoped analysis reports (consistency, anomaly, normal behaviour)
insight Catalog-templated insights rendered onto a knowledge-graph node

Plus SHACL shapes (mas-shapes.ttl, mas-shapes-custom.ttl) for validating knowledge-graph instances against the ontology.

Install

pip install oxp-ontology

Usage

Import the ontology in your own RDF

@prefix mas: <https://outshift-open.github.io/oxp-ontology/mas#> .
@prefix ex: <http://example.org/myproject#> .

ex:myAgent a mas:Agent ;
    mas:executes ex:myTask .

ex:myMAS a mas:MAS ;
    mas:hasAgent ex:myAgent .

Access bundled files and load graphs

from oxp_ontology import get_ontology_path, load_graph

# Valid names: mas, semantic, metrics, analysis, insight,
# mas-shapes, mas-shapes-custom
mas_path = get_ontology_path("mas")

g = load_graph("mas")

Validate and verify

from oxp_ontology import validate_bundled_ontologies, verify_kg_object

# Structural validation of the bundled TTL files
report = validate_bundled_ontologies()

# SHACL-based verification of a KG object against mas-shapes(-custom).ttl
verify_kg_object(my_kg_dict)

Query with SPARQL

PREFIX mas: <https://outshift-open.github.io/oxp-ontology/mas#>

SELECT ?agent ?task WHERE {
    ?agent a mas:Agent ;
           mas:executes ?task .
}

Documentation

Full ontology documentation (Widoco reference docs and WebVOWL visualizations for each component), versioning strategy, and the source repository are at:

https://outshift-open.github.io/observe-and-explain-platform/

License

Apache-2.0. The bundled ontology files declare dcterms:license <https://opensource.org/licenses/Apache-2.0> in their headers.

Metadata

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