XML-GL is a query language created in 1998 by Stefano Ceri and Sara Comai and Ernesto Damiani and Piero Fraternali and Stefano Paraboschi and Letizia Tanca.

A Graphical Language for Querying and Reshaping XML Documents. XML-GL is not a visual interface over a conventional, textual query language, but a graph-based query language with both its syntax and semantics defined in terms of graph structures and operations.

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