RSM

General repository for Rail System Model. RSM, also "semantic RSM", is the successor model of RTM (IRS30100: 2016).

History and rationale

Reasons for evolution are multiple:

• extended coverage, esp. railway operations
• changed technology: RSM uses ontologies (RDF/OWL) rather than class diagrams (UML).
• cooperation with, or explicit re-use of other models
• licensing conditions (currently: CC BY SA 4.0, by default)

Overview

RSM is modular. The modules can be:

• Domain ontologies with a clear focus on one aspect of the railway domain (e.g. network topology, rolling stock consist, ...)
• adapter ontologies, helping align RSM semantics with external ontologies
• helper ontologies, for want of widely shared ontologies about apects that are not specific to railways
• SKOS concept schemes; in our context, these are mostly the equivalent of "enumerations" or "enumerated classes"

RSM modules make use of various external ontologies for things that are not railway-specific, such as:

• upper ontology: DOLCE+DnS Ultralite, about physical objects, information objects, events, processes, situations, etc.
• ancillary ontologies:
  • QUDT, about quantities, units, uncertainties and tolerances
  • GeoSPARQL, about geograhic features, their geometries, and geometry data serialisation
  • SOSA/SSN, about sensors, actuators, and sampling

Railway Infrastructure

Following modules are the continuation of former RTM/RSM works:

• Topology :
• Localisation
• Network

In addition to the above, following modules were derived from existing works:

• Signalling: EULYNX DapaPrep 1.2 (UML) automated conversion into OWL
• Linear referencing: manually derived from ISO 19148 (which is UML-based)

The former RTM positioning package does no longer exist as such, as it is split between GeoSPARQL (geographic positioning), RSM-LinearReferencing, and local cartesian coordinates available either under RSM-Localisation, or in future links with IfcOwl or similar.

Rolling stock

• Rolling stock consist, about oriented vehicles in oriented formations or trainsets
• Rolling stock typology, about locomotives, wagons, and their capabilities (not: vehicles types in the sense of ERA-TV)

Railway operations

• Operations ontology (not broken down yet)

Helper ontologies

• List ontology, derived from the list ontology used by IfcOwl
• Parts and views ontology, dealing with mereology

Toolsets

• Ontology visual representation: GRAPHOL
• Ontology design: EDDY 3.8, a desktop GRAPHOL-based editor
• Ontology formal verification:
  • Protégé Desktop with Pellet and HermiT reasoners
  • ROBOT ontology and OWL profile checker (command-line tool, used by OntoQA template)