Subject: Re: [xsl] XSLT 3.0 Output and Serialization: Native XSLT message and error listeners? From: Philip Fearon <pgfearo@xxxxxxxxxxxxxx> Date: Tue, 22 Jan 2013 11:29:34 +0000 |
Explaining it this way, I can now understand why capturing xsl:message output is outside scope for the XSLT specification, I will look further into a possible XProc solution - though with the Calabash XProc processor I fear I need either to write my own MessageListener or change the existing Java logging configuration files. I guess anyone needing to pre-process xsl:message output can still do this within the XSLT that's running, using a similar technique to that prescribed for message localization. On Mon, Jan 21, 2013 at 11:51 PM, Michael Kay <mike@xxxxxxxxxxxx> wrote: > I think the question of how to capture xsl:message output (and for that > matter, xsl:result-document output) is a question of API design, which is > outside the scope of the spec itself. > > The JAXP spec rather clumsily maps xsl:message output to calls on the > warning() method of the ErrorListener. This is clumsy because warning() only > accepts strings, while xsl:message outputs XML, and the right mapping from > the XML to a string isn't clear. Saxon on the Java platform doesn't > implement this JAXP mapping, it instead has its own MessageListener > interface. > > Connecting the xsl:message and xsl:result-document outputs of one stylesheet > to the inputs of another is, I think, in the domain of XProc rather than > XSLT. > > Michael Kay > Saxonica > > > On 21/01/2013 20:05, Philip Fearon wrote: >> >> Dear list, >> >> With XSLT 1.0 and 2.0 there is (so far as I know) no specified way of >> assigning a 'native' XSLT listener to the message output from >> xsl:message instructions or to the error output. >> >> Will this change with the introduction of XSLT 3.0? If so, are there >> any publicly available details on this - or perhaps this is planned >> for 3.1? Does message and error listening exploit the xsl:output >> declaration? Can it exploit the new streaming capabilities in XSLT 3.0 >> (like xsl:merge) ? >> >> Ideally, I would like to assign an XSLT module to handle all message >> and error events - this would avoid needing to shell out to C# or Java >> classes using implementation specific interfaces (which just feels >> wrong). >> >> A typical use case for this would be for XSLT test frameworks >> implemented in XSLT that need to test all message and error outputs >> for a given input. >> >> Thanks >> >> Phil Fearon
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