[Zope3-dev] Re: RFC: Publication Post-Processing

[Janko Hauser]

Am 16.09.2005 um 15:59 schrieb Jim Fulton:

> Paul Everitt wrote:
>
>> Jim Fulton wrote:
>> Consider the headings under "Need for page-composition support",  
>> "Pipelines", "Transitive Adaptation", and the subset described  
>> under "Subscription".  It might be possible to also do these  
>> inside a WSGI Twisted in Zope 3.2, for example.  It might also be  
>> possible to do these in mod_python.
>> They all depend on whether "Publication Post-Processing" should be  
>> able to access content *beyond* what enters the publication process.
>>
>
> I'm not sure what you are getting at here.

We need a definition what we mean with pipelines. I understand them  
with a unix-background, where elements of a pipeline are working on  
the result of the earlier elements. This is data driven, so a  
pipeline element does only get the information in the data plus some  
parameters. Paul probably means the reaching back of the pipeline  
elements in the application-server context. For example are the  
pipeline elements be called by a controller, which additionally holds  
the context of the object in the application space.

In contrast the elements could purly be data driven, working on xml- 
data and nothing else. This looks more defined and is probably be  
simpler, but I see and fear that then parameter stuff is encoded in  
the xml-data to steer some transformations later in the pipeline.

__Janko