SPARQL/Variables

A query variable is marked by the use of either "?" or "$"; the "?" or "$" is not part of the variable name. In a query, $abc and ?abc identify the same variable.

In this book only variables marked with "?" are used.

Allowable characters are [a-z], [A-Z], [0-9], _, · and also diacrictics like áéíóú etcetera.

Example