Need a way to distinguish plain text, microdown text and a mere printstring

[Ducasse]

for example if caption := '$$ %caption=Ze great formula'... as microdown

the developer may want to

caption  asMicrodown 
> Ze **great** formula'

caption plainText
> Ze great formula

or 
caption printBlockObjects
> 
'an Array(Text(Ze ) BoldFormat{ Text(great) } Text( formula))'.