TROV Pre-Release Vocabulary Reference - Transparency Certified

DRAFT

This document is a draft and subject to revision. Please submit feedback or report issues.

Frozen snapshot of the pre-release vocabulary used by early TRACE implementations. Lists only the terms actually produced by the pre-release implementations, with term changes and migration guidance for TROV 0.1.

Document Section	Description
Vocabulary Metadata	Namespace, prefix, and status
Scope	What terms are included
Classes	Core entities, artifacts, arrangements, and locations
Properties	TRO, TRS, composition, arrangement, TRP, and warrant chain properties
TRS Capabilities	Capability types produced by pre-release implementations
TRP Attributes	Attribute types and their warrant links
External Vocabularies	RDF, RDFS, and schema.org terms used alongside TROV
Term Changes in TROV 0.1	Term renames
Migration	Steps to convert pre-release declarations to 0.1

Vocabulary Metadata¶

Namespace: https://w3id.org/trace/2023/05/trov#
Prefix: trov:
Status: Retired. This is a frozen snapshot of the pre-release vocabulary used by early TRACE implementations. It is superseded by TROV 0.1.

Migration notice. The 2023/05 namespace was used during early development by pre-release TRACE implementations. TRO declarations created with this namespace remain valid documents but are not guaranteed to conform to TROV 0.1 without conversion. New implementations should use TROV 0.1 (https://w3id.org/trace/trov/0.1#). See the Versioning Strategy and Roadmap for details.

Scope¶

This document records only the terms actually used by the pre-release implementations. Terms previously defined in the ontology file (trov.ttl) or in hand-written examples but not produced by early implementations are not listed here. For the full vocabulary including additional capability types and attribute types, see TROV 0.1.

Classes¶

Core Entities¶

Class	Description
`trov:TransparentResearchObject`	A set of research artifacts produced by one or more TRPs and signed by the assembling TRS.
`trov:TrustedResearchSystem`	A system that performs TRPs and assembles TROs.
`trov:TrustedResearchPerformance`	A supervised unit of work conducted by a TRS.

Artifacts and Compositions¶

Class	Description
`trov:ArtifactComposition`	The set of all digital artifacts described by a TRO.
`trov:ResearchArtifact`	A digital object identified by a content hash.
`trov:CompositionFingerprint`	A hash computed over the sorted hashes of all artifacts in a composition.

Arrangements and Loci¶

Class	Description
`trov:ArtifactArrangement`	A named collection of artifact locations capturing where artifacts were at a point in a workflow.
`trov:ArtifactLocus`	The location of a specific artifact within an arrangement.

Properties¶

TRO Properties¶

Property	Description
`trov:wasAssembledBy`	Links a TRO to the TRS that produced it.
`trov:hasComposition`	Links a TRO to its artifact composition.
`trov:hasArrangement`	Links a TRO to an artifact arrangement.
`trov:hasPerformance`	Links a TRO to a TRP it describes.
`trov:hasAttribute`	Links a TRO to a transparency attribute. Present but empty in pre-release implementations.

TRS Properties¶

Property	Description
`trov:hasCapability`	Links a TRS to a capability it declares.
`trov:publicKey`	The public key associated with the TRS. ASCII-armored GPG key.
`trov:name`	Short name for the TRS.
`trov:owner`	Owner of the TRS.
`trov:description`	Description of the TRS.
`trov:contact`	Contact email for the TRS.
`trov:url`	URL for the TRS.

Composition and Artifact Properties¶

Property	Description
`trov:hasArtifact`	Links a composition or locus to an artifact.
`trov:hasFingerprint`	Links a composition to its fingerprint.
`trov:sha256`	SHA-256 digest of an artifact’s contents or a composition’s sorted artifact digests.
`trov:mimeType`	MIME type of an artifact.

Arrangement and Locus Properties¶

Property	Description
`trov:hasLocus`	Links an arrangement to one of its loci.
`trov:hasLocation`	Resource path for an artifact within an arrangement.

TRP Properties¶

Property	Description
`trov:wasConductedBy`	Links a TRP to the TRS that conducted it.
`trov:accessedArrangement`	Links a TRP to an arrangement it read from.
`trov:contributedToArrangement`	Links a TRP to an arrangement it wrote to.
`trov:hasPerformanceAttribute`	Links a TRP to a transparency attribute claimed for it.
`trov:startedAtTime`	When the performance began.
`trov:endedAtTime`	When the performance ended.

Warrant Chain Properties¶

Property	Description
`trov:warrantedBy`	Links a TRP attribute to the TRS capability that justifies it.

TRS Capability Types¶

Type	Description
`trov:CanProvideInternetIsolation`	The TRS can isolate computations from network access during a TRP.
`trov:CanRecordInternetAccess`	The TRS can record all network accesses made during a TRP.

TRP Attribute Types¶

Type	Warranted by	Description
`trov:InternetIsolation`	`trov:CanProvideInternetIsolation`	The TRP was conducted without network access.
`trov:InternetAccessRecording`	`trov:CanRecordInternetAccess`	All network accesses during the TRP were recorded.

External Vocabularies Used¶

Both implementations use the following external vocabularies alongside TROV:

Prefix	Namespace	Terms used
`rdf:`	`http://www.w3.org/1999/02/22-rdf-syntax-ns#`	`rdf:type` (implicit via `@type`)
`rdfs:`	`http://www.w3.org/2000/01/rdf-schema#`	`rdfs:comment`
`schema:`	`https://schema.org`	`schema:CreativeWork`, `schema:Organization`, `schema:creator`, `schema:name`, `schema:description`, `schema:dateCreated`

The schema: terms appear on the TRO root node and on the TRS node.

Term Changes in TROV 0.1¶

Pre-release	TROV 0.1
`trov:ArtifactLocus`	`trov:ArtifactLocation`
`trov:hasLocus`	`trov:hasArtifactLocation`
`trov:hasArtifact` (on locus)	`trov:artifact`
`trov:hasLocation`	`trov:path`
`trov:sha256`	`trov:hash` (object with `trov:hashAlgorithm` + `trov:hashValue`)

Migration to TROV 0.1¶

Based on the current 0.1 draft, updating a pre-release TRO declaration to conform to TROV 0.1 involves the following changes. These steps may be revised as 0.1 is finalized.

Update the namespace URI in the @context block from https://w3id.org/trace/2023/05/trov# to https://w3id.org/trace/trov/0.1#.
Replace trov:sha256 with a trov:hash object containing trov:hashAlgorithm and trov:hashValue. For example, "trov:sha256": "abc..." becomes "trov:hash": { "trov:hashAlgorithm": "sha256", "trov:hashValue": "abc..." }.
Add trov:vocabularyVersion property to the TRO root object (value "0.1").
Rename artifact location terms. trov:ArtifactLocus → trov:ArtifactLocation, trov:hasLocus → trov:hasArtifactLocation, trov:hasArtifact (on locations) → trov:artifact, trov:hasLocation → trov:path.

History¶

Date	Change
2026-03-09	Initial publication.