Internal data model & mappings

HKG data model

• considerations as to why using schema.org as a base
• further namespaces (PROV-O, HDO)
• JSON Schema documents autmatically generated from pydantic models

Mappings

• SSSOM usage

from SWAT-poster:

data model

The KG uses an internal data model derived primarily from Schema.org, PROV-O, and selected classes from the Helmholtz Digitization Ontology (HDO). It focuses on representing core metadata of Helmholtz digital assets while maintaining strong interoperability with widely used standards.

Note: While most categories are derived from Schema.org, the Instruments category uses specialized external vocabularies (e.g., DDI Discovery and DataCite) to ensure domain-specific precision. Types like CreativeWork or Intangible exist within the Knowledge Graph but are not currently indexed for the UI.