L
- LandXML : a non-proprietary standard for data exchange among the land development, civil engineering and surveying communities. Ceases to exist as of End Nov 2012
- Lenex: exchange format for swim rankings
- LGML: Linguistics Markup Language, for describing natural languages
- Link contract
- LOGML: Log Markup Language, for describing the log reports of web servers
Read more about this topic: List Of XML Markup Languages