Query Languages

1. SQL
   1. BNF Grammars for SQL-92, SQL-99 and SQL-2003

Markup Languages: HTML and XML

1. Markup languages
   1. The Extreme Markup Languages Conferences
2. HTML
   1. W3C’s HTML site
3. XML
   1. W3C’s XML site
   2. XML.org, applying XML in industry
4. Some example XML Applications
   1. MathML
   2. Chemical Markup Language (CML)
   3. DARPA Agent Markup Language (DAML), for defining the semantic web
   4. Geography Markup Language (GML)
   5. RuleML, for describing rules of all sorts, including derivation rules, transformation rules, and action rules
   6. Business Narrative Markup Language (BNML) for eContracts

Graphics Metalanguages: SVG

1. Other graphics metalanguages
2. SVG
   1. The W3C Specification

Music

Dance

1. A grammar of the Foxtrot