Technical Publications production and in turn eLearning has it's own emerging XML technologies
Darwin Information Typing Architecture (DITA)
DITA is an XML-based architecture for authoring, producing, and delivering technical information.
DITA defines tags so that longer content can be broken into shorter content
DITA is driven by Adobe
XMetaL -
XMetaL uses a word processor metaphor and is designed to be used by writers and not programmers.
XMetal is driven by Coral