Good point. I always forget about LINK= option. Mostly because to use it, I have to plan ahead and figure out what the name of file is going to be in order to code the link correctly.
For navigation between separate HTML pages, the use of NEWFILE=, FRAME=, CONTENTS= and BODY= might work, too. This would mean that ODS would build the links to the next file automatically and the file name would not need to be known ahead of time. Even without NEWFILE=, the use of FRAME= and CONTENTS= puts links into the navigation pane to facilitate going back and forth in a big HTML document.