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14:53:39 <trackbot> Meeting: XForms Users Community Group Teleconference
14:53:39 <trackbot> Date: 21 January 2022
14:56:30 <Steven> Agenda: https://lists.w3.org/Archives/Public/public-xformsusers/2022Jan/0010
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15:01:09 <Alain> Alain has joined #forms
15:03:37 <Steven> Topic: ACTION-2309: Research xpath3 function definitions (Erik)
15:03:55 <Steven> https://lists.w3.org/Archives/Public/public-xformsusers/2022Jan/0011
15:04:42 <Steven> Erik: Erik: Could we use XQuery function definition? (XPath doesn't have a syntact for it)
15:04:59 <Steven> s/Erik: Erik:/Erik:/
15:05:34 <Steven> ... In XForms we can declare a function with a signature using XPath/XQuery syntax
15:05:47 <Steven> ... and the body inside the element
15:06:09 <Steven> ... with an extension because XPath2 doesn't have variables
15:06:23 <Steven> ... XPath 3 has <let>
15:06:40 <Steven> ... so we define variables local to the function.
15:07:00 <Steven> ... This compatible with XPath 1 and 2. Unneeded for XPath 3
15:07:15 <Steven> ... because XPath 3 supports it natively
15:07:45 <Steven> ... If qw use the XQuery syntac, we would still have to have an enclosing element
15:07:58 <Steven> s/qw/we/
15:08:43 <Steven> ... So I think it might not give us much
15:09:30 <Steven> ... but since we want to support other expression languages, I don't think it gives us much.
15:10:10 <Steven> ... We would lose the ability to support functions properly in earlier versions of XPath
15:10:45 <Steven> Alain: I don't have a strong opinion either.
15:11:00 <Steven> ... I'd like more time to think about it.
15:11:20 <Steven> Steven: We'll leave it at that now, and come back in the near future.
15:11:32 <Steven> Topic: ACTION-2312: Devise text for submission using @value (Steven)
15:11:32 <Steven> https://www.w3.org/2022/01/14-forms-minutes.html#t04
15:11:40 <Steven> Steven: No progress this week.
15:11:50 <Steven> Topic: Detecting/Ignoring unsaved data
15:11:50 <Steven> https://lists.w3.org/Archives/Public/public-xformsusers/2022Jan/0008
15:12:24 <Steven> Alain: I was wondering how to do this.
15:13:04 <Steven> ... maybe if the data has been submitted, maybe it's OK.
15:14:47 <Steven> Alain: We have "Model-destruct" but we can't cancel it.
15:15:02 <Steven> Erik: We do this at a higher level that we have
15:15:30 <Steven> ... we track the data status. Use events on the main instance.
15:16:07 <Steven> ... we also have auto-save
15:16:45 <Steven> ... browsers have b/f caches
15:17:06 <Steven> ... you register a handler when the data is dirty
15:19:05 <Steven> Steven: We either need something better than model-destruct, or redefine model-destruct
15:19:32 <Steven> Erik: We get one xforms-ready per model
15:19:44 <Steven> ... in JS that is before-unload
15:20:30 <Steven> ... which is not that useful.
15:21:52 <Steven> Steven: If we defined xforms-done, could we do anything?
15:23:51 <Steven> Alain: Existing webpages just cancel the exit action
15:24:23 <Steven> Erik: We do this, I need to look it up
15:27:22 <Steven> Steven: If the processor was listening for the exit event, and then dispatches an XForms-done event; if that is cancelled then the processor doesn't do the exit. Wouldn;t that be enough?
15:27:34 <Steven> ... The XForms can deal with messages.
15:27:49 <Steven> s/;/'/
15:27:58 <Steven> [Erik looks at his code]
15:28:12 <Steven> Erik: THe code is simple.
15:28:17 <Steven> s/TH/Th/
15:29:12 <Steven> Erik: No prevent default; you register and deregister the handler.
15:29:54 <Steven> ... I'm not convinced using XForms events would work well
15:33:08 <Steven> Steven: According to the spec it looks like we can use AVTs in event attributes.
15:33:51 <Steven> ... so that would work.
15:34:44 <Steven> Erik: I'm not sure if it would be possible to support though.
15:35:30 <Steven> Steven: In brief -- needss more thought.
15:35:35 <Steven> s/ss/s/
15:36:11 <Steven> Erik: We could define actions that reports to the processor that it shouldn't automatically exit
15:37:00 <Steven> Alain: We don't have an isdirty function.
15:38:10 <Steven> Steven: It's quite simple to do yourself. I have a tutorial somewhere
15:38:35 <Steven> Alain: It's less declarative
15:39:03 <Steven> Erik: You could add a function that tells you whether a ref is dirty or not.
15:39:32 <Steven> Steven: You sould also need a function to clear the dirty bit.
15:39:41 <Steven> s/sould/would/
15:40:50 <Steven> ACTION: Steven research the alternatives for 'dirty' data, and produce code in all of them for comparison
15:40:54 <trackbot> Created ACTION-2313 - Research the alternatives for 'dirty' data, and produce code in all of them for comparison [on Steven Pemberton - due 2022-01-28].
15:41:03 <Steven> rrsagent, make minutes
15:41:03 <RRSAgent> I have made the request to generate https://www.w3.org/2022/01/21-forms-minutes.html Steven
15:41:32 <Steven> Topic: Timescale Plans
15:41:32 <Steven> https://lists.w3.org/Archives/Public/public-xformsusers/2022Jan/att-0004/2022-plans
15:42:14 <Steven> Steven: ANything you would particularly like to comment on?
15:42:19 <Steven> Erik: Need more time.
15:42:25 <Steven> s/AN/
15:42:39 <Steven> s/ything/Anything
15:43:13 <Steven> Steven: Next week on the agenda specifically <control/> and mirroring.
15:43:22 <Steven> Topic: AOB
15:43:34 <Steven> [None]
15:43:39 <Steven> [ADJOURN]
15:43:45 <Steven> Present: Alain, Erik, Steven
15:43:54 <Steven> rrsagent, make minutes
15:43:54 <RRSAgent> I have made the request to generate https://www.w3.org/2022/01/21-forms-minutes.html Steven
15:44:42 <Steven> Chair: Steven
15:44:44 <Steven> rrsagent, make minutes
15:44:44 <RRSAgent> I have made the request to generate https://www.w3.org/2022/01/21-forms-minutes.html Steven