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Re: EXProc step proposal: message

From: Romain Deltour <rdeltour@gmail.com>
Date: Wed, 21 Apr 2010 10:08:59 +0200
Message-Id: <775DAB11-497F-4C57-8A6D-674B7E501DA1@gmail.com>
To: xproc-dev@w3.org
+1. A "message" step would definitely be a nice addition to EXProc.

What about replacing the stderr/stdout options by a "level" option  
using an established enumeration (like the ones used in logging  
tools): DEBUG, INFO, WARNING, ERROR ?

The processor could then be configured to output the messages to  
stderr or stdout or any other channel depending on the message level...

BR,
Romain.

Le 21 avr. 10 à 09:42, <Toman_Vojtech@emc.com> a écrit :

> Hi all,
>
> One of the most useful extension steps (not only) for debugging XProc
> pipelines is a "message" step that can be used for displaying  
> (possibly
> dynamic) messages on the console. At the moment, both Calabash and
> Calumet have their own proprietary implementations of this step, but I
> think that adding the "message" step to the EXProc library would be  
> much
> appreciated by the XProc users.
>
> This is how the step is declared in Calumet:
>
> <p:declare-step type="x:message" xmlns:x="...">
>  <p:option name="message" required="true"/> <!-- string -->
>  <p:option name="stderr" select="'true'"/> <!-- true/false -->
>  <p:option name="stdout" select="'false'"/> <!-- true/false -->
>  <p:input port="source" sequence="true"/>
>  <p:output port="result" sequence="true"/>
> </p:declare-step>
>
> The step behaves similar to p:identity, except that it has a required
> option "message" that specifies the message to be displayed on  
> standard
> output and/or standard error output (controlled by the "stderr" and
> "stdout" options). (I believe the "message" step in Calabash behaves
> similarly.)
>
> Regards,
> Vojtech
>
>
> --
> Vojtech Toman
> Principal Software Engineer
> EMC Corporation
> toman_vojtech@emc.com
> http://developer.emc.com/xmltech
>
Received on Wednesday, 21 April 2010 08:09:34 GMT

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