GraphStore`

SPARQLProject

SPARQLProject["var"]

is a query operator that yields solutions containing only values for the variable "var".

SPARQLProject["newvar"expr]

yields solutions containing only the variable "newvar" whose value is computed from expr.

SPARQLProject[{vspec₁,vspec₂,…}]

selects and computes values for multiple variables.

Details and Options

A RightComposition of operators SPARQLSelect[…]/*…/*SPARQLProject[…]/*… can be used in SPARQLExecute to query a SPARQL endpoint. Composition is also supported.
SPARQLProject[…] can be applied to the result of a SPARQLSelect query.
In SPARQLProject[{…,"newvar_i"expr_i,…,"newvar_i+n"expr_i+n,…}], SPARQLVariable["newvar_i"] can be used in expr_i+n to refer to the value of expr_i.

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Data about books:

Find books and compute their time since publication in years:

Solutions for two variables:

Project to variable "x":

The same using KeyTake:

Compute the square of "x":

The same using Query:

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