[ZPT] Re: [Zope3-dev] attr name space (was: RFC: abolishing python:expressions)

[Fernando Martins]

FWIW,

attr:*

makes a lot of sense to me since the attributes belong to XHTML, whereas

define:*

does not at all, for the opposite reason, ie, the variables have nothing to
do with XHTML; only with TAL, therefore they should be hidden from XHTML
space and stay where they are: within a tal:define. Otherwise, it's like
having a Python module with the variables defined outside in an HTML file.

My nobody's 0.02€
Fernando

> -----Original Message-----
> From: zpt-bounces at zope.org [mailto:zpt-bounces at zope.org]On Behalf Of
> Fred Drake
> Sent: sexta-feira, 30 de Dezembro de 2005 20:05
> To: Page Templates List
> Cc: Alexander Limi
> Subject: [ZPT] Re: [Zope3-dev] attr name space (was: RFC: abolishing
> python:expressions)
>
>
> Alexander Limi sent this note to the zope3-dev list:
>
>     http://mail.zope.org/pipermail/zope3-dev/2005-December/017270.html
>
> Essentially, he proposed that we introduce additional namespaces to
> allow each define or attribute to be computed in a separate attribute,
> something like this:
>
> > <a attr:href="some/url"
> >    attr:title="some/title" />
>
> There's been a good bit of discussion, with both proponents and
> detractors.  I'll try to summarize fairly; if anyone thinks I've
> mis-represented what's been said, please correct me.
>
> Proponents say:
>
> - Using ";" and multiple lines to define variables is hard to read.
> - Using ";;" as an escape is difficult to understand.
> - Separate attributes are easier to handle for XML tools (no
> semicolons with any meaning)
> - More consistent syntax, no need to learn a special way to separate
> several attributes/defines
>
> Opponents say:
>
> - The more limitted attribute set makes it easier to verify using schemas.
> - Order of evaluation could not be well-defined without being arbitrary.
> - More namespaces means more to learn.
>
> Continuing discussion should take place on the ZPT list, since this
> affects more than just the Zope-based ZPT users.
>
>
>   -Fred
>
> --
> Fred L. Drake, Jr.    <fdrake at gmail.com>
> "There is no wealth but life." --John Ruskin
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