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Xdl

XDL is an acronym for XML Data Language. It's a markup language used to describe functions, signatures, and definitions in the XQuery programming language. The specification for this extension is part of the W3C's XQuery 1.0 and XPath 2.0 Formal Semantics recommendation from 2007 (often called XQueryX). Using XML-based syntax makes it more modular — functions can be described independently of one another and then combined into larger documents when needed. This flexibility aids in understanding program structures, sharing code between different projects more easily while also enabling better tool support such as code editors that provide autocomplete based on defined functions within an XDL file.

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