- From: Erik Bruchez <erik@bruchez.org>
- Date: Tue, 1 Oct 2013 14:07:29 -0700
- To: Eric van der Vlist <vdv@dyomedea.com>
- Cc: "public-xformsusers@w3.org" <public-xformsusers@w3.org>, public-forms@w3.org
Eric, We discussed this during our last XForms call. We discussed two solutions: 1. Import the XSLT 2 function-available() function: http://www.w3.org/TR/xslt20/#function-function-available Note that XPath 3 now has function-lookup(), but this cannot be used with XPath 2 as this requires support for function() items: http://www.w3.org/TR/2013/CR-xpath-functions-30-20130108/#func-function-lookup 2. Improved error handling in XForms This is a separate but related topic. XPath and action errors should be, at least optionally, recoverable. This way, if you have a an error in an action which uses an unknown function, you could recover from that, and deduct that there was an issue with an XPath expression. #1 would be easy, both at the spec level and for implementors. This would also be the most direct solutions to your requirement. #2 is more involved, but also more useful, and a more indirect way, and solves in general a slightly different problem. My proposal would be to do both for XForms 2.0. I have an action item to make a proposal for improved error handling already. Please let us know if you have any comments on this! -Erik
Received on Tuesday, 1 October 2013 21:15:58 UTC