[ZPT] TAL: What does "action cancellation" mean?

[Evan Simpson]

Alan Kennedy wrote:
> I've been reading the TAL spec in some detail, and I can't 
> figure out what "action cancellation" means.

This needs to be updated.  The idea of "cancellation" has been 
superceded by the 'default' value.

For example, tal:replace="request/x | default" will replace the 
statement tag with the value of "request/x" unless it does not exists, 
in which case the replace has no effect -- the "default" text is left in 
place.

Cheers,

Evan @ Zope