Work Package 1 (DSID): ontology, vocabulary, and examples for DDHub semantic interoperability across drilling data.

• model/ - DDHub ontology in multiple serializations (XML, Turtle, JSON, Manchester, RTF) with generated HTML docs (model/html/documentation).
• examples/ - OWL examples for common signals and circuits (flow-rate, hookload, torque, ECD, hydraulic/mechanical circuits, LWD, HIL demo, manifests).
• docs/ - narrative docs for the semantic model, use cases, drilling signal descriptions, architecture draft, and vocabulary development notes.
• src/DWIS-Vocabulary/ - .NET solution DWIS.Vocabulary.sln containing vocabulary/schema tooling, instance editors, standard sets, controls, utilities, tests, and local NuGet packages for offline builds.

• Explore the model: open model/DDHub_xml.owl (or Turtle/JSON) in your OWL tool of choice; HTML docs live at model/html/documentation/index-en.html.
• See example patterns: browse examples/ for OWL instances of signals and circuits.
• Build vocabulary tools: dotnet build src/DWIS-Vocabulary/DWIS-Vocabulary.sln (use LocalPackages/ if offline).
• Read background: docs/DDHub_semantic_model.md, docs/use_cases/Use_cases.md, docs/drilling_signals/home.md, docs/architecture/DDHub_architecture.md.