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The use of linked data as an alternative encoding for UML described domain models is becoming more and more a common practice. In the Netherlands the national standard for geo-information modelling prescribes UML as the standard for specifying conceptual domain models and GML as the preferred encoding using the ISO 19118 and ISO 19136 as the UML – GML encoding rules. It also states that when a different encoding is used proper encoding rules must be referenced or be developed. For UML to RDF several specifications of encoding rules exist including major contributions by INSPIRE , INSPIRE Guidelines for RDF encoding for spatial data. However, these encoding guidelines indeed are guidelines and can only be implemented after a detailed fit for purpose analysis. This leading to more detailed rules described by best practices.
A team was established representing the Dutch geo information modelling domain both in UML object oriented data as well as three main Geo-RDF implementation approaches. The latter being COINS for the exchange of BIM information; OrOx as a RDF vocabulary for Sewer Utility Network information and a generic national implementation of W3C/SHACL RDF. The approach centred around developing transformation rules for mapping from the source UML geo metamodel to the target metamodel(s) for the SKOS/RDF/SHACL/OWL implementations. The rules were developed on the basis of the existing metamodels but also on a use case about a test case domain model: the Golf Course Domain Model and a related dataset.
The research showed that transformation rules can be developed but that an automated-only transformation is not a preferred solution and will lead to sub-optimized ontologies. Automated transformation can lead to a valid model that follows all the rules, but not as a correct representation of the Universe of Discourse. It is therefore recommend to manually design and optimize RDF ontologies from automated transformation of source UML domain models guided by a combination of both predefined transformation rules as well as the understanding of the Universe of Discourse. We have identified a set of best practices and common pitfalls that occur when blindly transforming a UML model tot RDF. This intelligence guided approach is described by a set of the best practice transformation rules. The hands-on project strengthened the collaboration between two still different geo-implementation communities and shows how data and models can be connected
Topic Area: [3.5] Best practices Abstract Type: Oral Presentation
Academic: Yes Data Provider: No Data User: No INSPIRE Implementer (IT): Yes INSPIRE newbies: No Policy Officers: No Public Administration (MS/Regional/Local): No Thematic specialists: No Other_theme: Linked data community, datamodeller Comments: UML model, RDF Ontologies, OWL, Linked data
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