Changes between Version 36 and Version 37 of rdfstore


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Timestamp:
Oct 29, 2012, 2:33:39 AM (12 years ago)
Author:
simonp
Comment:

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  • rdfstore

    v36 v37  
    4747== Motivations ==
    4848
    49 RDF (Resource Description Framework) is a general method to decompose knowledge into simple facts that describe at most three pieces of information (a triple). In a metadata record, the triple would be: vocabulary name (the meaning of the fact), metadata element name, text content of metadata element.
     49= RDF Layers =
     50
     51RDF (Resource Description Framework) is a general method to decompose knowledge into simple facts consisting of entity-attribute-value (a triple known as subject-predicate-object in RDF terms). As an example in the metadata context, an RDF triple from a metadata record could be dataset-title-'A Series of 1:25,000 Vegetation Maps For Tasmania'.
     52
     53RDFS (or RDF Schema) adds a class structure to RDF triples.
    5054
    5155A lot of resources in the !GeoNetwork space have been devoted to managing ISO19115 metadata records, ISO19115 metadata objects and relationships between objects and records. In many ways, exploring RDF is an attempt to achieve the same outcomemeans that metadata records would be broken down into small facts that can be used and reused in any metadata record (not just an ISO metadata record) - history shows that no single metadata standard has ever gained ascendancy over all domains eg. Taxon Concept Schema and Darwin Core are popular for biological data, Dublin Core remains popular for (which?) some applications, SDMX is used for statistical metadata and so on - using a generic fact representation seems to be a more worthwhile and sustainable approach