[Zope3-dev] ? vs $

[Guido van Rossum]

SteveA and I are confused why in a path in TALES you can use ? for
expansion, but $ elsewhere.  E.g. you can write

    <td tal:content="context/?jobid/summary">

I believe that in string expressions you can use $foo to expand a
variable:

    <td tal:content="string:${jobid}">

Why can't we use $jobid in the first example?

(Embarrassingly, I think I was at the meeting where this was invented,
but I can't recall the rationale.)

--Guido van Rossum (home page: http://www.python.org/~guido/)