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Graphics
Bridge to relational
databases
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Most of the data are stored in relational databases
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- “RDFying” them may be an impossible task
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“Bridges” are being defined:
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- a layer between RDF and the database
- RDB tables are “mapped” to RDF graphs, possibly on the fly
- in some cases the mapping is generic (columns represent
properties, cells are, e.g., literals or references to other tables
via blank nodes)…
- … in other cases separate mapping files define the details
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SPARQL is becoming the tool of choice to query that data
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- ie, “SPARQL endpoints” are defined to query it