XF 2.0 Templating language syntax and docs?

Ok, I'll look into the XF1 doc as a starting point. I have another quick question if you don't mind: apparently it's possible to use templating elements inside of HTML attributes. Is that something intended and supported or just an accidental unsupported feature?

Code:
<b title="<xf:if is="$id == 1">...</xf:if>">...</b>
 
Yeah you can open up some advanced expressions within templates (for a number of uses). The expressions are, in some ways, very similar to PHP syntax, though not everything is supported there.
HTML:
<b title="{{ $id == 1 ? 'One thing' : 'Another' }}">...</b>
 
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