Reference

Evidence Ontology

Namespace: https://schema.bra0.org/evidence-os#
Prefix: evo:
Version: 0.2.0
Created: 2026-04-18
Modified: 2026-04-23
Classes: 12
Properties: 21
Source: ontologies/governance/evidence-os/evidence-os.ttl

Classes (12)

URI	Label	Description	Superclass
evo:AmbientAgentInvocation	Ambient Agent Invocation	A single ambient-agent run (per RQ2 §3.2). One-to-one with a prov:Activity but carries ambient-specific attributes: bounded context, policy, run metadata.	prov:Activity
evo:Commit	Commit	Atomic code change. Links to its informing requirement instance via prov:wasInformedBy.	prov:Activity
evo:ComplianceFramework	Compliance Framework	A regulatory or standards framework (NIS2, DORA, ISO 27001, HDS, EHDS) modeled as a skos:ConceptScheme. Its controls are skos:Concept instances organized by skos:broader/narrower. Cross-framework relations between FrameworkArticle instances are expressed directly with SKOS mapping properties (skos:exactMatch, skos:closeMatch, skos:broadMatch, skos:relatedMatch) — no intermediate mapping class. Justified by UC-2, UC-4, UC-5, UC-12.	skos:ConceptScheme
evo:Control	Control	A policy or compliance control that demands evidence. Maps to framework nodes (NIS2, DORA, ISO 27001, HDS, EHDS). A Control is a normative requirement grounded in skos:Concept semantics (an information entity that can migrate between frameworks). Orthogonal to PROV-O Activity/Entity.	skos:Concept
evo:CoverageReport	Coverage Report	Aggregate coverage evidence (line, branch, E2E). Uses sosa:Observation for time-series tracking.	prov:Entity
evo:DatasetFixture	Dataset Fixture	A test dataset as first-class evidence. Typed as dcat:Distribution for dataset discovery.	prov:Entity
evo:Deployment	Deployment	Change-to-environment binding event. Links to the target environment via evo:targetEnvironment (a dcat:DataService).	prov:Activity
evo:FrameworkArticle	Framework Article	A structural element of a compliance framework: article, clause, or annex. Uses skos:broader/narrower for hierarchy, skos:notation for article numbers, skos:prefLabel for title. Controls (evo:Control) reference articles via evo:derivedFromArticle. Cross-framework equivalences use SKOS mapping properties directly on article instances. Justified by UC-2, UC-5, UC-6.	skos:Concept
evo:MergeRequest	Merge Request	Change-control gate. Links to its reviewer agent via prov:wasAssociatedWith.	prov:Activity
evo:TestRun	Test Run	A single test execution result. Uses prov:Revision for re-runs. Links to the tested commit via evo:onCommit and to the fixture via evo:onDataset.	prov:Entity
evo:Workflow	Workflow	A demo-eligible workflow as a first-class entity in the evidence graph. Operational anchor for the dogfood discipline (RQ3 §4.3). Pairs with WorkflowExecution (one instance per invocation).	skos:Concept
evo:WorkflowExecution	Workflow Execution	A single execution of a Workflow. Reused class (subclass of prov:Activity), not a new sub-class addition to the §3.2.1 eight. Operational instrumentation (v0.1.4 non-breaking widening).	prov:Activity

Object Properties (14)

URI	Label	Domain	Range
evo:byAgentService	by agent service	evo:AmbientAgentInvocation	asc:AgentService
evo:chosenAlternative	chosen alternative	prov:Activity	prov:Entity
evo:declaredContext	declared context	evo:AmbientAgentInvocation	sd:NamedGraph
evo:derivedFromArticle	derived from article	evo:Control	evo:FrameworkArticle
evo:evidences	evidences	prov:Entity	evo:Control
evo:hasArticle	has article	evo:ComplianceFramework	evo:FrameworkArticle
evo:justifies	justifies	prov:Entity	prov:Activity
evo:linkedChange	linked change	prov:Activity	---
evo:onCommit	on commit	evo:TestRun	evo:Commit
evo:onDataset	on dataset	evo:TestRun	evo:DatasetFixture
evo:requiredBy	required by	evo:Control	---
evo:runsWorkflow	runs workflow	evo:WorkflowExecution	evo:Workflow
evo:targetEnvironment	target environment	evo:Deployment	dcat:DataService
evo:underMandate	under mandate	evo:AmbientAgentInvocation	asc:Mandate

Datatype Properties (7)

URI	Label	Domain	Range
evo:agentRoleProfile	agent role profile	odrl:Policy	xsd:string
evo:demoEligible	demo eligible	evo:Workflow	xsd:boolean
evo:groundingMode	grounding mode	odrl:Policy	xsd:string
evo:jurisdictionalScope	jurisdictional scope	evo:ComplianceFramework	xsd:string
evo:nodeBadge	node badge query	dcat:Catalog	xsd:string
evo:nodeLabel	node label query	dcat:Catalog	xsd:string
evo:runContext	run context	evo:WorkflowExecution	xsd:string

SPARQL example

# List all classes in this ontology
PREFIX evo: <https://schema.bra0.org/evidence-os#>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

SELECT ?class ?label ?comment
WHERE {
  ?class a owl:Class ;
         rdfs:label ?label .
  OPTIONAL { ?class rdfs:comment ?comment }
  FILTER(STRSTARTS(STR(?class), STR(evo:)))
}
ORDER BY ?label