About the MARC2RDA Triplestore (m2r-triplestore)
The m2r-triplestore is a GraphDB repository that contains RDF/XML triples produced by the transformation code from the MARC2RDA Project.
- MARC21 records processed during Phase I from the following sources were transformed to MARC XML and processed using the MARC2RDA transformation code to produce RDF/XML triples:
- A subset of the Library of Congress catalog
- A subset of the National Library of New Zealand catalog
- Original records from the University of Washington catalog
- The resulting RDF/XML triples were then uploaded to the M2R-PROJECT triplestore.
- When you arrive at the triplestore, you may see a “Cookie” notice. Whether you click OK or try to change the Cookie settings, you will be asked to Login. Until we figure out how to prevent this from happening, the best thing to do is to just ignore the Cookie notice and proceed as outlined below.
- If you know how to use SPARQL, then you can do many sparkly things with the data. At the time of initial release, just to get you started, we have provided a number of “Saved SPARQL queries”, e.g.:
- Fetch manifestations
- Click <Execute>
- This brings up an index of the number of manifestations you 'fetched'.
- You can change the number of manifestations you want to fetch by changing “100” in the LIMIT tag below to: 1,001 or 10,400, or 150,000, etc.
CONSTRUCT WHERE
{?s a <http://rdaregistry.info/Elements/c/C10007>.}
LIMIT 100
- Ignore manifestations where the 'subject' begins with http://marc2rda.info/transform/man#marc (these are where we put the original MARC records that were transformed, for future reference)
- Change the Sort order to Z-A
- Click on the 'subject' link to open the description set for a manifestation
- We have not figured out how to show RDA labels instead of RDA curies as 'predicates' or Appellations from linked entity descriptions instead of IRIs as 'subjects'. Look for:
- rdamo:P30139 = expression manifested
- rdaeo:P20231 = work expressed
- rdawo:P10312 = related person of work
- Click on the 'object' link to open the description for a linked entity
- NB: At this point, inverses have only been provided for the primary relationships between WEM entities (Resource entity relationships for constructing a coherent description); so, use the browser back arrow to return to a previous page
- View a visual graph
- Click 'Visual graph' on any entity description display to explore its relationships
- Export RDF data
- …
