The Conceptual Data Model is a product of Europe's Rail MOTIONAL Project. The CDM-MOTIONAL public repository and dependent repositories shall host the Conceptual Data Model, a public MOTIONAL deliverable. The UICrail GitHub is used, awaiting a possible setup of repositories under Europe's Rail.
The CDM repository mostly links into other repositories that are public by default; some of them may result in being private (e.g. for hosting non-public data for testing purposes).
The CDM repository wiki will be populated in due time, mostly for guidance of non-participants.
About the CDM, its history, and rationale, see the Wiki home page.
Currently, following main repositories are available (some of them temporarily private, awaiting IPR and licensing clarification):
- CDM-RSM, which includes infrastructure topology, geometry, and localisation. Other RSM areas may be added later, as packages are rewritten in RDF/OWL.
- CDM-RST, about rolling stock.
- CDM-Telematics, about railway train operations rather than telematics (to be renamed).
- CDM-IFC, providing backgrounds regarding IFC (Industry Foundation Classes), by buildingSMART International, and their usage in the CDM.
- CDM-Signalling, providing links with the comprehensive EULYNX DataPrep model for signalling data.
Under the hood, the CDM also leverages established ontologies or schemas like IFC, QUDT, QUDT (unit), XSD, GeoSPARQL, W3C SSN, W3C SOSA, ...
Europe's Rail MOTIONAL Project is working on making available various datasets available, using the CDM vocabulary. More information available on the Wiki
In addition, ongoing tasks are summed up under the (non-public) MOTIONAL "project" (in the sense of Github).
The CDM heavily rests on Semantic Web technologies, and in particular RDF/OWL as a formal language. For introduction to RDF/OWL, we recommend:
- Demystifying OWL for the Enterprise, by Michael Uschold. 237 pages. (c) Springer Nature Switzerland AG 2022, ISBN:978-3-031-79481-0. clear and easy introduction for absolute beginner, with practical examples using Protégé desktop.
- An introduction to ontology engineering, by C. Maria Keet. 318 pages. (c) Individual author and college publications 2018 (http://www.collegepublications.co.uk). ISBN 978-1-84890-295-4. with wider scope and historical depth.
Besides, there are many introductory papers or slides available on internet, but these cannot match the paedagogic qualities of these two books. Please note that the writer does not know the authors personally, nor does he get paid for this advertisement.