[Zope3-dev] Re: URLs & Paths

[Jim Fulton]

sean.bowman@acm.org wrote:
> 
> hi,
> 
> > To get the contact "view" presentation, you'd use:
> >
> >   .../aContact/view;view
> >
> > where here the name "view" names both a specific presentation
> > component and the presentation namespace.
> 
> I don't quite understand this.  Why is the "view" there twice?  And what
> exactly is a "presentation namespace?"  The word "namespace" makes me
> think of referring to names in the view component that are defined in the
> content, but that doesn't seem to be what's going on here.

This is a bad example, which is why I'm updating the
tutorial to use a different view name. :)

In addition, the tutorial will also be updated so that
we no longer have to specify a namespace for contacts in
URLS.

In the future, the example will be:

  .../aContact/info

which is equivalent to:

  .../aContact/info;view

which is equivalent to:

  .../aContact/info;ns=view

> > Let me try to clarify. To me, "acquire" means find something in a
> > place/context. Component lookup is always placeful.
> 
> I don't exactly understand this, either; there seems to be some tension
> between the use of ";acquire" as in ".../aContact/foo;acquire" and the
> statement above. 

The expression:

  .../aContact/info;acquire

would look for an info object in a folder (directly or indirectly)
containing aContact. The acquisition namespace, when used with
content will search the content namespace.

This is in contrast to:

  .../aContact/info;view

which looks for an info presentation component (in a presentation
service in a service manager) in a folder (directly or indirectly)
containing aContact.

> If "foo" is a component and component lookup is
> placeful, why do we have to add an explicit instruction to ";acquire" ?

"acquire" searches content, but "view" searches presentation components.

Buth searches use acquisition in the sense that they search am acquisition
context. They search the context in different ways.

Jim

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