Format guide
XML
Extensible Markup Language
XML is a hierarchical text format with opening + closing tags, originated at W3C in 1998 as a structured alternative to HTML. Still the lingua franca for legacy enterprise data exchange (SOAP web services, Office Open XML/.docx, RSS feeds, Java Spring configs, SVG, financial reporting like XBRL). JSON has displaced it in modern web APIs; XML lives on in compliance, document formats, and B2B integrations.
How to open a XML file
Any text editor with XML syntax highlighting. Browsers render most XML files with collapsible tree views. Validators against XSD schemas come with most IDEs.
Primary use
Hierarchical data interchange (legacy APIs, document formats, B2B).
Convert other formats to XML
Convert XML to other formats
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