Undocumented "?" usage in path expression

[Jonathan Ballet]

While reading http://wiki.zope.org/ZPT/TALESSpecification13 , I saw the third comment of hathawsh for 2003 (!) which highlighted the usage of "?" in path expression.

Basically, the following path expression:

    <span tal:content="here/?myvar" />

will be evaluated as "here/foo" if the value of "myvar" is "foo", and "here/bar" if the value is "bar", etc.

This is so handy, but I can't find any reference to this (there's just a test in zope.tales). I think the specification should be updated accordingly.

[Benji York (benji)]

Possible copy/pate fodder: http://www.zope.org/Documentation/Books/ZopeBook/2_6Edition/AppendixC.stx

[Colin Watson (cjwatson)]

The zope.tales project on Launchpad has been archived at the request of the Zope developers (see https://answers.launchpad.net/launchpad/+question/683589 and https://answers.launchpad.net/launchpad/+question/685285). If this bug is still relevant, please refile it at https://github.com/zopefoundation/zope.tales.