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Re: calabash: redefining standard step

From: James Fuller <james.fuller.2007@gmail.com>
Date: Thu, 11 Dec 2008 16:37:24 +0100
Message-ID: <a0ad8ffe0812110737h3fe318ectdce39e0a8efa9690@mail.gmail.com>
To: Toman_Vojtech@emc.com
Cc: xproc-dev@w3.org

On Thu, Dec 11, 2008 at 4:32 PM,  <Toman_Vojtech@emc.com> wrote:
>
>> "James Fuller" <james.fuller.2007@gmail.com> writes:
>>
>> > consider the following pipeline
>> >
>> > <p:pipeline name="pipeline"
>> >             xmlns:p="http://www.w3.org/ns/xproc">
>> >
>> > <!-- should not evaluate this declare-step //-->
>> > <p:declare-step name="test1" type="p:identity">
>> >     <p:input port="source" sequence="true"/>
>> >     <p:output port="result" sequence="true"/>
>> >     <p:count/>
>> > </p:declare-step>
>> >
>> > <p:identity/>
>> >
>> > </p:pipeline>
>> >
>> > should this not throw an error ? perhaps err:XS0002 or
>>
>> It could throw err:XS0002, but I think we need a new error because
>> an attempt to declare "p:my-new-step" should also fail.
>>
>> In fact, the spec already forbids it:
>>
>>   Except as described in Section 2.13, "Versioning Considerations",
>>   the XProc namespace must not be used in the type of steps. Neither
>>   users nor implementers may define additional steps in the XProc
>>   namespace.
>>
>> but through editorial carelessness, I seem to have forgotten to
>> explicitly make it a static error.
>
> Redeclaring of built-in steps (such as p:identity) is, I think, catched
> by err:XS0036 ("All the step types in a pipeline must have unique names:
> it is a static error if any step type name is built-in and/or declared
> or defined more than once in the same scope.")

I thought this applied as well, but I would like to have a simple
(re)definition like XS0002 does with names.

cheers, Jim
Received on Thursday, 11 December 2008 15:38:08 GMT

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