XML in Context

XML itself

A simplified subset of SGML (ISO 8879)

Builds on 30 years of research and 14 years of standardization

Widely deployed (as SGML) in major industrial settings

Powerful data modeling -- no limits on namespace or structural depth

But easy to implement and small enough for Web browsers

Not a language but a metalanguage

Designed to support the definition of an unlimited number of languages for specific industries and applications

All XML languages can be processed by a single lightweight parser