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Re: Extensibility questions

From: Norman Walsh <ndw@nwalsh.com>
Date: Mon, 12 May 2008 16:01:00 -0400
To: public-xml-processing-model-wg@w3.org
Message-ID: <m2mymvthqb.fsf@nwalsh.com>
/ "Innovimax SARL" <innovimax@gmail.com> was heard to say:
|>  | Does it mean that there is no constraint on parameters or outputs ?
|>
|>  You don't get to specify outputs when you call an atomic step, so they
|>  aren't really relevant are they?
|
| So it means that if I want to add an alternate output to a step, I can do that
|
| Let's say for example for p:delete, add a "alternate" output for example,
| and then in the following step connect its input to alternate
|
| Where will it fail, if it does ?

You can't change the declaration for a step in the XProc namespace, so
you can't add another output. Adding another output would change the
inputs and outputs, so you aren't allowed to do that with an extension
attribute.

|>  There are no constraints on paramters, beyond the fact that you can
|>  only specify them on a step that has (at least one) parameter input
|>  port.
|
| Well, if I'm correct, it is said in the spec that
| [[
| It is a static error (err:XS0034) if the specified port is not a
| parameter input port or if no port is specified and the step does not
| have a primary parameter input port.
| ]]
| which means that we can bind a parameter port named "foo" since there
| is no equivalent of the err:XS0012 for input parameters
| [[
| it is a static error (err:XS0012) if the port given does not match the
| name of an input port specified in the step's declaration.
| ]]

Sorry, I don't follow. What do you think you can do?

                                        Be seeing you,
                                          norm

-- 
Norman Walsh <ndw@nwalsh.com> | The most universal quality is
http://nwalsh.com/            | diversity.-- Montaigne

Received on Monday, 12 May 2008 20:01:39 GMT

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