Subject: [xsl] A proposal:xsl:result-document asynchronous attribute From: Kurt Cagle <kurt@xxxxxxxxxxxxx> Date: Sun, 9 Mar 2003 22:30:35 -0800 |
Michael, I've noticed in the current (Nov 2002) XSLT 2.0 specification the specific provision for <xsl:result-document>'s return value is given as follows: <snip> Technically, the result of evaluating the xsl:result-document instruction is an empty sequence. This means it does not contribute any nodes to the result of the content constructor it is part of. </snip> I'd like to raise a use-case that may suggest that this needs to be expanded. One provision that I can see for the use of XSLT 2.0 is in the generation of SOAP messages for consumption in web services. Such messages could easily be facilitated within the existing specification in those cases where the message architecture is asynchronous (i.e., the SOAP message is sent as an independent packet without expecting any return information), but it is not terribly useful in situations where a need for a synchronous response would be required. I would like to propose that the <xsl:result-document> element be amended with the creation of a new attribute *asynchronous* with values "yes" (default) and "no". The behaviour with asynchronous="yes" would be as given in the current specifications - the result of the command will be to place an empty string into the output stream. However, if asynchronous="no", then the processor would post the template contents of the <xsl:result-document> element to the URL and retrieve the result of that operation, which would then be placed into the output stream. Note that the resulting message may very well be an soap fault, but this would still be an XML message that can be parsed and manipulated. Errors would be raised in precisely the same situations as would exist for the XPath 2 document() function. I believe that this change would be easy to implement, and would provide significant utility in the arena of web services using XSLT. -- Kurt Cagle XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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