Please check out new "hidden text" version of OpenFormula

Can people take a look at the new version of the OpenFormula spec and see if there are problems in how "hiding" works?  I didn't hide everything that needs to be hidden, but I did hide various sections and types of text.  I'd like to know if this technique will work (since we haven't done it before), or if there's a hidden "gotcha".

--- David A. Wheeler