Turtle is a textual syntax that allows RDF graphs to be written in a compact and natural text form, with abbreviations for common usage patterns and datatypes
About
Turtle (Terse RDF Triple Language) is a format for expressing data in the Resource Description Framework (rdf) data model with a syntax similar to sparql. RDF, in turn, represents information using "triples", each of which consists of a subject, a predicate, and an object. Each of those items is expressed as a Web URI. Hence Turtle provides levels of compatibility with the existing n-triples and notation3 formats as well as the triple pattern syntax of sparql.
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