SPARQL Syntax Expressions (alternatively, SPARQL S-Expressions) is a

parse tree A parse tree or parsing tree (also known as a derivation tree or concrete syntax tree) is an ordered, rooted tree that represents the syntactic structure of a string according to some context-free grammar. The term ''parse tree'' itself is use ...

(a.k.a. concrete syntax) for representing

SPARQL SPARQL (pronounced ":wikt:sparkle, sparkle", a recursive acronym for SPARQL Protocol and RDF Query Language) is an RDF query language—that is, a Semantic Query, semantic query language for databases—able to retrieve and manipulate data sto ...

Algebra Algebra is a branch of mathematics that deals with abstract systems, known as algebraic structures, and the manipulation of expressions within those systems. It is a generalization of arithmetic that introduces variables and algebraic ope ...

expressions.

Application

They have been used to apply the

BERT Bert or BERT may refer to: Persons, characters, or animals known as Bert *Bert (name), commonly an abbreviated forename and sometimes a surname *Bert, a character in the poem "Bert the Wombat" by The Wiggles; from their 1992 album ''Here Comes a ...

language model to create SPARQL queries from

natural language A natural language or ordinary language is a language that occurs naturally in a human community by a process of use, repetition, and change. It can take different forms, typically either a spoken language or a sign language. Natural languages ...

questions.

External links

SPARQL Algebra in the W3C SPARQL Query Specification

that can also print the Algebra expressions
SPARQL Syntax Expressions translations of the DAWG test suite

References

SPARQL RDF data access {{Comp-sci-stub