The prefix is the component id specified by the user. 
Without it, Tapestry will generate one for you.
It is explained on p124 in TIA.

Shing

--- David Leangen <[EMAIL PROTECTED]> wrote:
> 
> This leads me to a question that I've been a bit
> curious about...
> 
> Would somebody mind kindly explaining the mechanism
> of having a prefix, such
> as the [EMAIL PROTECTED] below?
> 
> Why is this legal? What does the prefix "form_name"
> mean? How can it be
> reused? Why is this useful?
> 
> Or, alternatively, if there is already someplace
> where this is explained
> (including in TIA), I'd love to get a reference.
> 
> 
> Thanks!
> Dave
> 
> 
> 
> > -----Original Message-----
> > From: stephen smithstone
> [mailto:[EMAIL PROTECTED]
> > Sent: 5 April 2005 05:32
> > To: Tapestry users
> > Subject: Re: Tapestry Form component name
> >
> >
> > i can't remember exactly but in the jwcid add the
> name before the @Form
> > so something like jwcid="[EMAIL PROTECTED]" and i
> always add
> > name="form_name" and id="form_name" just incase
> 
> 
> 
>
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