XML (Extensible Markup Language)
XML (Extensible Markup Language) is a W3C standard for describing structured data as text, using nested tags that you define yourself. It is both human-readable and machine-readable, and supports schemas to validate documents. Many other formats are built on XML, including SVG, RSS feeds and the internals of DOCX and XLSX files.
Use XML when a system, API or industry standard requires it, such as electronic invoices, sitemaps, feeds or configuration files, or when you need strict validation with a schema. For lightweight data exchange between web applications, JSON is usually more compact.
Source formats: .xml