The Interop Glossary

An evolving vocabulary for the law of interoperability governing electronic data format and communication protocol technical specifications, standards, and technical regulations.

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XML
Extensible Markup Language. XML is a relatively simple, very flexible standard for creating markup languages that describe the structure of data, a metalanguage for the specification of markup languages. There are thousands of derivatives, generically referred to as XML languages. XML and its derivatives have as particular hallmarks their human legibility, separation of presentation and data, easy transformability to other XML languages, and ease of repurposing and reformatting data extracted using a parser. See generally, W3C XML activities web site.See also: XML transformation language
XML transformation language
A computer language designed specifically for transforming an input XML document into an output format, usually another XML markup language. See generally Wikipedia article for a list of XML transformation languages. See also: convert, XML