Vector Layer to RDF
The SPARQLing Unicorn QGIS plugin can convert QGIS vector layers to RDF in two different ways.
This conversion method can be accessed using the converting layer to RDF dialog.
At first, the RDF vocabulary to convert to should be chosen. The plugin allows the conversion to a variety of standard vocabularies. If the GeoSPARQL vocabulary is chosen, different ways to represent the geometry data are possible and can be selected. Finally, the layer to convert should be selected.
The result is an RDF file in the SPARQL Unicorn namespace with the following attributes:
- Literal type detection for XSD data types
- Creation of Datatype and ObjectProperties according to the structure of the vector layer in the SPARQL Unicorn namespace
- Reusage of Geometry vocabularies according to the selected geometry encoding
This dataset can be used in a graph database, but it is highly recommended to be improved in an ontology editor such as Protege to rename properties to other standardized vocabularies or to improve literal types and contents.