It is a WYSIWYM ( What You See Is What You Mean ) editor, with automated music-and page-layout functionality.
"' WYSIWYM "'( an acronym for " what you see is what you mean " ) is a paradigm for editing a structured document.
In the 2010s, interactive front-end components of TeX, such as TeXworks or LyX have produced " what you see is what you mean " ( WYSIWYM ) hybrids of DTP and batch processing.
The WYSIWYG editing model has been criticized, primarily because of the low quality of the generated code; there are voices advocating a change to the WYSIWYM model ( What You See Is What You Mean ).
Unlike most word processors, which follow the WYSIWYG ( " what you see is what you get " ) paradigm, LyX has a WYSIWYM ( " what you see is what you mean " ) approach, where what shows up on the screen is only an approximation of what will show up on the page.
These are often called WYSIWYG ( " What You See Is What You Get " ) editors, but not all of them are WYSIWYG : graphical XML editors can be WYSIWYG when they try to display the final rendering or WYSIWYM ( " What You See Is What You Mean " ) when they try to display the actual meaning of XML elements.