• DITA
• DOM
• DTD
• DocBook
• Entities
• FRBR
• HTML
• Java
• LMNL
• MathML
• NVDL
• Namespaces
• Office Documents
• Python
• RDF
• RelaxNG
• SAX
• SGML
• SQL
• SVG
• Schematron
• TEI
• Topic Maps
• UBL
• Unicode
• XHTML
• XLink
• XPath
• XPointer
• XQuery
• XSD/W3C Schema
• XSL-FO
• XSLT
• Editing/Authoring
• Mapping
• Parsing
• Processing
• Publishing
• Querying
• Text Analysis
• Transforming
• Validating
• Visualizing
• API
• Concurrent Markup/Overlap
• Content Management
• Datatyping
• Encryption
• External Markup
• Information Architecture
• Intellectual Property
• Interoperability
• Knowledge Management
• Knowledge Representation
• Markup Languages
• Metadata
• Modeling
• Multimedia
• Natural Language Processing
• Open Source
• Programming
• Schema Languages
• Semantic Web
• Semantics
• Standardization
• Technology Adoption
• Trees/Graphs
• Web Services
Durusau, Patrick and Matthew Brook O'Donnell. “Implementing concurrent markup in XML.” In Proceedings of Extreme Markup Languages 2001.
Gangemi, Joseph V. “XML for Publishing.” In Proceedings of Extreme Markup Languages 2006®.