XML-QL

XML-QL is the name of a query language for XML . Many of their ideas flowed into the XQuery language . In practice, XML-QL hardly plays a role anymore, instead mostly XQuery is used, which is based on XML-QL.

XML-QL was largely developed by AT&T Labs and has the special ability that join operations can also be carried out on semi-structured data . XML-QL is based on a where/constructconstruct instead of a select/from/whereconstruct, where the -clause corresponds to constructthe select-clause and the where-clauses to the fromand where-clauses.

Web links

w3.org XML-QL: A Query Language for XML

Individual evidence

↑ Michael Erdmann: Ontologies for the conceptual modeling of the semantics of XML . Books on Demand, 2001, ISBN 978-3-8311-2635-4 , pp. 36 .
↑ Steffen Staab: Query languages for XML. (PDF) In: Lecture slides for the lecture Information Systems & Semantic Web. University of Koblenz Landau, pp. 1–2 , accessed on January 28, 2015 .

[1] Michael Erdmann: Ontologies for the conceptual modeling of the semantics of XML . Books on Demand, 2001, ISBN 978-3-8311-2635-4 , pp. 36 .

[2] Steffen Staab: Query languages for XML. (PDF) In: Lecture slides for the lecture Information Systems & Semantic Web. University of Koblenz Landau, pp. 1–2 , accessed on January 28, 2015 .