Hierarchy classification:

1. top of the aat hierarchies
2. Associated Concepts Facet
3. Associated Concepts (hierarchy name)
4. [technology and related concepts]
5. technology (general associated concept)
6. information technology
7. [computer languages, codes, and protocols]

Anotations

Scope note:

Extensible Markup Language, or XML, is a markup language and file format for storing, transmitting, and reconstructing arbitrary data. Based on SGML, it allows the mark-up of electronic documents, and can aid the exchange of data via the World Wide Web, and allows users to customize tags.