This application is made to convert RDF from one format to EDM. It is made as an experiment for the Royal Library dataset.
A sample version of the application can be build and run with the following command:
docker-compose build
docker-compose up
This will use the centsprenten database from the Royal Library as an example. The output it produces will be stored in the data folder. When needed the docker-compose file can be changed to switch the volume mapping.
The applicatie has the following properties which van be set through the environment in the docker-compose file
converter.dsUri This properties is used to indicate the source URL from which the data needs te be crawled
converter.outputFile Necessary. This indicates the outputFile to which the data needs to be written
converter.mappingFile Necessary. This indicates the mappingFile which is used in the mapping of the crawled format to the EDM format
converter.crawlerFile Necessary. This indicates the location of the crawled file, outputted by the crawler. This file is only needed to check if the crawling went correctly.
converter.defaultLanguage Default=nl This is the default language which will be se to all literals missing a language. Only need to set when default is incorrect.
converter.outputFormat Default=TTL This indicates the output format of the file. Only need to be set when default is incorrect. Options are: "RDF/XML", "RDF/XML-ABBREV", "N-TRIPLE", "TURTLE", (and "TTL") and "N3"
The mapping file (/data/mapping/mapping.txt) indicates which predicates need to be converted.
In the example we indicate that the http://schema.org/author need to be converted to http://purl.org/dc/elements/1.1/creator.
This meand that from the original crawled output we go from:
<http://data.bibliotheken.nl/id/gvn/KONB14Borms0657> <http://schema.org/author> "Dirk van Lubeek (1747-1811)" .
To:
<dc:creator xml:lang="nl">Dirk van Lubeek (1747-1811)</dc:creator>
Currently there are two special mappings:
- Height and Width are both mapped to extend which means they need to be prefixed.
- Thumbnails need to be reformatted, when encountered it will edit the link to the thumbnail