Uniform and declarative RDF generation
from heterogeneous data sources
mappings processor
Data OWNER / PUBLISHER
defines
RDF
DB CSV JSON XML RDF
RDF Mapping Language (RML)
generic scalable mapping language
for generating and interlinking
RDF data from heterogeneous resources
in an integrable and interoperable fashion
superset of the W3C standardized
R2RML mapping language
http://rml.io
Uniform and declarative RDF generation
from heterogeneous data sources
RML mappings processor
Data OWNER / PUBLISHER
defines
RDF
DB CSV JSON XML RDF
> Geographical data in Flanders
▪ Must follow its obligations, regulations, standards, …
> F.e. SDI-Flanders partnership (decree, implementing decree, commandments, …)
> MUST’s for describing metadata:
▪ ISO
> 19115 (datasets/series), 19119 (services), 19139 (implementation), 19110 (feature catalogue)
▪ INSPIRE
> Directive: Implementing Rules on Metadata + Technical Guidelines on Metadata
▪ SDI-Flanders
> Best Practices on Metadata v1.0 (metadata for datasets, dataset series, services, feature catalogues)
▪ OGC / INSPIRE
> Catalogue Service for the Web (OGC Catalogue Services Specification 2.0.2) = Discovery Service (INSPIRE) =
Zoekdienst (SDI-Flanders)
> Geoportal: http://www.geopunt.be
The way to open geographical data in Flanders?
Geo > Open 109
> Open data Portal in Flanders:
▪ SHOULD follow its manual
> SHOULD HAVE’s for describing metadata:
▪ DCAT-AP
> Portal: http://opendata.vlaanderen.be/
▪ CKAN
The way to open geographical data in Flanders?
Geo > Open 110
> So, do I have to describe my data on both portals?
> The power of metadata:
▪ Describe it only once,
▪ Create multiple use
The way to open geographical data in Flanders?
Geo > Open 111
1
The way to open geographical data in Flanders?
Geo > Open 112
> Follow the SDI-track to describe metadata (MUST)
▪ Appear on http://www.geopunt.be
▪ AND appear on http://opendata.vlaanderen.be/
> Because of:
▪ Set keyword “Open data in Flanders” in the metadata record
▪ Via CSW harvest of Geopunt metadata
▪ With filter on keyword “Open data in Flanders”
▪ Mapping to DCAT (XSLT: ISO 19139 to DCAT)
▪ Mapping to CKAN