Topic 8: Social Semantic Web Flashcards
(9 cards)
Semantic Web
Extension of the web that adds semantics to web components to enable machines to understand and interpret web content through
OWL
(Web Ontology Language)
Formal language for defining ontologies
SPAQRL
Query language. Retrieves and manipulates RDF formatted data
Linked Data
onnecting data from different sources on the web using standardised methods.
5 Stars of Linked Data
★ Make data available under an open licence
★★ As above, but with machine-readable structured data e.g. Excel instead of images of a table
★★★ As above, but with a non-proprietary format e.g. CSV instead of Excel
★★★★ As above, but using W3C standards (RDF, SPARQL) so others can point to your data
★★★★★ As above, but linked to other people’s data to provide context
SKOS
Single Knowledge Organisation System (SKOS)
SKOS Semantic Relationships
- Broader: One concept is more general than another
- Narrower: One concept is more specific than another
- Related: Non-hierarchical between concepts that share some degree of semantic connection
SKOS Mapping Relationships
- Exact Match: Precise equivalence between two concepts
- Close Match: Close correspondence between two concepts
- Broad Match: One concept encompasses the meaning of another but not vice versa
- Narrow Match: One concept is more specific instance of another but not vice versa
- Related Match: Concepts are related in some way but not hierarchical
FOAF
Friend of a Friend. Describes people and their relationships
Not Domain specific
Relationship examples:
- knows
- friendOf
- memberOf
- based_near
- account