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Ontology Prefixes

Standard prefixes used throughout the Naas Ontology documentation and implementation.

Core Ontology Prefixes​

BFO (Basic Formal Ontology)​

@prefix bfo: <http://purl.obolibrary.org/obo/> .
  • Description: Basic Formal Ontology - foundational categories
  • Usage: All fundamental entity types (Entity, Continuant, Occurrent, etc.)
  • Example: bfo:BFO_0000001 (Entity), bfo:BFO_0000015 (Process)

CCO (Common Core Ontologies)​

@prefix cco: <https://www.commoncoreontologies.org/> .
  • Description: Common Core Ontologies - mid-level concepts
  • Usage: Agent, Organization, Information Entity, Artifact concepts
  • Example: cco:ont00001017 (Agent), cco:ont00001180 (Organization)

ABI (Agentic Brain Infrastructure)​

@prefix abi: <http://ontology.naas.ai/abi/> .
  • Description: Naas-specific AI and ontology concepts
  • Usage: AI agents, cognitive capabilities, workflows, triggers
  • Example: abi:AIAgent, abi:CognitiveCapability, abi:Workflow

Standard W3C Prefixes​

RDF/RDFS​

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
  • Usage: Basic RDF constructs, labels, comments
  • Example: rdfs:label, rdfs:subClassOf, rdf:type

OWL​

@prefix owl: <http://www.w3.org/2002/07/owl#> .
  • Usage: OWL ontology constructs
  • Example: owl:Class, owl:ObjectProperty, owl:DatatypeProperty

SKOS​

@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
  • Usage: Definitions, examples, concept relationships
  • Example: skos:definition, skos:example, skos:broader

XSD​

@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
  • Usage: Data types for literal values
  • Example: xsd:string, xsd:integer, xsd:decimal, xsd:boolean

Domain-Specific Prefixes​

FOAF (Friend of a Friend)​

@prefix foaf: <http://xmlns.com/foaf/0.1/> .
  • Usage: Person and social network concepts (when needed)
  • Example: foaf:Person, foaf:name, foaf:knows

Dublin Core​

@prefix dc: <http://purl.org/dc/elements/1.1/> .
@prefix dcterms: <http://purl.org/dc/terms/> .
  • Usage: Metadata about resources
  • Example: dc:creator, dcterms:created, dcterms:modified

Usage Examples​

Complete Turtle Header​

@prefix bfo: <http://purl.obolibrary.org/obo/> .
@prefix cco: <https://www.commoncoreontologies.org/> .
@prefix abi: <http://ontology.naas.ai/abi/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

# Your ontology content here...

Class Definition Example​

abi:AIAgent a owl:Class ;
    rdfs:subClassOf cco:ont00001017 ; # Agent
    rdfs:label "AI Agent"@en ;
    skos:definition "An agent that is an artificial intelligence system capable of autonomous decision-making and task execution."@en ;
    skos:example "ChatGPT, Claude, Gemini, and other AI systems that can engage in conversations and perform various tasks."@en .

Individual Instance Example​

abi:claude_agent a abi:AIAgent ;
    rdfs:label "Claude AI Agent"@en ;
    bfo:BFO_0000087 abi:ethical_reasoning_capability ; # has role
    abi:hasIntelligenceScore "64"^^xsd:integer .

Prefix Registration​

Internal Prefixes​

  • abi: - Registered for Naas-specific concepts
  • naas: - Reserved for future platform-specific concepts

External Dependencies​

  • bfo: - Maintained by OBO Foundry
  • cco: - Maintained by CUBRC
  • Standard W3C prefixes - Maintained by W3C

Best Practices​

  1. Consistency - Always use the same prefix for the same namespace
  2. Clarity - Choose prefixes that clearly indicate the source ontology
  3. Standards - Use established prefixes for well-known ontologies
  4. Documentation - Document any custom or domain-specific prefixes
  5. Versioning - Consider version-specific prefixes for major ontology updates