Similar to XML

GPS Exchange Format

Groff (software)

Journal Article Tag Suite

JSON-LD

Keyhole Markup Language

MXML

Office Open XML file formats

Open Scripture Information Standard

Pandoc

QML

Roff (software)

RuleML

SABLE

SCRIPT (markup)

SGML entity

Standard Generalized Markup Language

SXML

SyncML

TeX

Well-known text representation of geometry

Wireless Markup Language

YAML

ZK (framework)