Skip to main content

INTERSECT Scientific Data Layer (SDL)

Connecting scientific data with meaning – A flexible and semantic ecosystem for modern science.

GitHub Logo

Repository Service Overview

The Repository Service provides durable, versioned, and structured storage for semantic resources in the SDL ecosystem.

It supports:

  • Ingestion of RDF resources into named graphs
  • Version control of individual resource states
  • Read/write access via Linked Data Platform (LDP) patterns
  • Organization of data by workspace, user, or platform context

Capabilities

Resource Management

  • Each RDF resource is stored in a named graph
  • Graphs are organized by container (e.g., workspace, platform, experiment)
  • Supports updates, replacements, and deletions with provenance tracking

Versioning

  • All changes to a resource are stored as distinct named graph revisions
  • Changes are tracked using prov:Activity, prov:wasDerivedFrom, and timestamp metadata

Query and Resolution

  • Resources can be queried using SPARQL endpoints
  • Supports GET, PUT, PATCH, DELETE via LDP-compliant interfaces

Example Resource Record

acl:Sample789 a acl:SolidSample ;
  dct:title "Annealed perovskite powder" ;
  dct:created "2025-07-15"^^xsd:date ;
  prov:wasGeneratedBy acl:SynthesisRun456 ;
  dct:isPartOf <https://example.org/repo/workspaces/acl-project/> .

Example Graph Metadata

<https://example.org/repo/graphs/sample789-v1> a ssd:GraphVersion ;
  dct:identifier "sample789-v1" ;
  prov:generatedAtTime "2025-07-15T10:30:00Z"^^xsd:dateTime ;
  prov:wasDerivedFrom <https://example.org/repo/graphs/sample789-v0> .

Federation and Linking

  • Repository contents are discoverable via the Catalog Service
  • Can interoperate with external triple stores (e.g., Blazegraph, GraphDB)
  • Supports import/export in multiple RDF serializations (Turtle, JSON-LD, N-Quads)
On this Page: