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Data models#

Part of the LDT Governance and Trust Framework — instantiates the iSHARE Data Space Template block Data models (© iSHARE Foundation, see Legal notices).

Purpose#

Shared data models make participants interpret data the same way — semantic interoperability so providers and consumers speak the same language.

LDT instantiation — where we stand#

  • Baseline (per Grant Agreement): DCAT-AP for dataset descriptions, combined with iSHARE/Gaia-X data descriptions; NGSI-LD context broker pattern and OASC MIM2 compliance for city data; JSON-LD as serialisation.
  • Canonical vocabulary: schemas.ishare.eu/vocab# remains the canonical iSHARE namespace — the LDT extends, never forks it. LDT-specific terms get their own namespace, coordinated with iSHARE Foundation.
  • Domain models to select/extend: mobility & LEZ (Cartagena — ERTICO advice), energy/PED (ESSIM/DEMkit semantics), airport operations (FHC), port logistics events (Hamburg), CO₂/emissions indicators (LogiNex — incl. LCMM / ISO 23795-1 method outputs).

🧩 Building block requested — Owner: iLabs + both cities + LogiNex (mobility advice: ERTICO)#

What we need: per domain: which existing models/ontologies are reused (source, version), which extensions are needed, and who maintains them. LogiNex: the CO₂ indicator model incl. method references. Confirm MIM2/NGSI-LD mappings per city twin.

Format: Markdown section in this page (merge request) · Due: 26 Sep 2026 (v0.5) · Status: OPEN

Guiding questions#

All 18 of the template's questions for this block, with the 5 LDT answer slots to fill, are on data-models/guiding-questions.md. The digest below is the subset that most shapes this block.

  • Which data products require a shared semantic model, and can existing models be reused directly?
  • Which meta-standards (JSON-LD, RDF/OWL) and controlled vocabularies are linked?
  • Who acts as data-model provider; how are versioning, change approval and conflicts managed?
  • Which vocabulary service hosts the models and how are they discoverable across EU data spaces?

PD4 mapping#

Feeds PD4 chapter 5 — Data & data-model sharing.