WordPerfect sits in the middle between LaTeX and Word when it comes to its document model.
It's a stream processor like LaTeX that just has a raw stream of text with tags applied to the text for formatting control.
It's a word processor like Word that shows you how that raw stream of text with tags looks on the document without having to recompile the document each time to see the results.
Anyone who wants to do a new FOSS document processor, please blatantly steal this model.

