Open Energy Family — Knowledge Graphs#
This site documents two knowledge graphs developed in one repository. They share a repository, a tech stack and a platform. They do not share a model.
- OEKG — Open Energy Knowledge Graph
Energy studies and scenarios, described against the Open Energy Ontology. Live: populated by the Open Energy Platform's scenario-bundle factsheets and served from a SPARQL endpoint.
- Municipal Heat Planning KG
German kommunale Wärmeplanung — structured data extracted from published municipal heat plans. Early draft. The name
mhpkgis provisional.
Start here#
| If you want to… | Go to |
|---|---|
| query the OEKG | SPARQL endpoint |
| know what fields a study or scenario has | Factsheet fields |
| understand how heat-plan data is produced | Workflow |
| know what tools and formats are used | Tech stack |
| understand why this repository looks the way it does | OEKG provenance |
One thing worth knowing immediately#
Neither graph lives in this repository as a file you can download and be done with. The
OEKG is served from a Jena Fuseki dataset and is written to by the platform, not by commits
here; the Turtle files in oekg/ are historical. The heat-planning graph is still a draft.
If you came looking for "the graph", the SPARQL endpoint is what you want, and OEKG provenance explains why the repository is arranged the way it is.
Status, honestly#
| OEKG | Municipal Heat Planning KG | |
|---|---|---|
| Model | Open Energy Ontology (OEO) | MHPO, which draws on OEO |
| How it is populated | OEP scenario-bundle factsheets, over SPARQL | RAG pipeline over published heat plans |
| Where the data lives | Jena Fuseki dataset | not yet decided |
| Maturity | live, in use | one OWL draft, 21 classes |
| Validation | shapes exist but validate no live graph | none yet |
That last row is not an oversight. See Tech stack for what is settled and what is still open — including the model source of truth, which is genuinely undecided.