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Reset and insert actions

From: Rafael Benito <rbenito@satec.es>
Date: Tue, 24 Oct 2006 14:31:05 +0200
To: <www-forms@w3.org>
Message-ID: <004201c6f768$46c2f880$eb21a4d5@int.satec.es>
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Hi all,

the reset action accepts a single attribute for the model to reset. It would
be useful for authors to add a second optional attribute @instance to reset
a single instance rather than the whole model. The same effect could be
accomplished using a sequence of setvalue, insert and delete actions; but
anyway it would be simpler to add @instance. In data entry applications it
is a common case to enter some general info and, then, run through a loop
entering data, sending them and then starting again the loop but keeping the
general info introduced at the begining of the form execution. For this kind
of applications, it would be useful, as you can store general info in ino
instance and the rest of the data in a different one which is reset for
every iteration.

In any case, the reset implemetation requires that the processor "remembers"
the initial state of the model. This fact draws me to some other thoughts:
in Xforms 1.0 there was a problem with the insert action when the last node
of an homogenous collection is deleted. This was solved in 1.1 through the
use of conditional actions and changes to the insert action. Nevertheless,
it would be simpler for authors to let the processor  "remember" the
"structure" of the homogenous collection (rather than the initial state,
because it could contain several rows and that is not what we want) and let
the insert action work correctly, even if nodeset is empty but this was not
the case for the initial data. In case the author wants to insert nodes with
a different structure, he can still do it using the @origin attribute of the
insert.

Regards,

Rafael Benito Ruíz de Villa
Director Area e-business
Móvil (+34) 617 314 293
rbenito@satec.es

MADRID <http://www.satec.es> 
Avda. Europa, 34 A
28023 Aravaca
Telf.: (+34) 91 708 90 00 / 91 211 03 00
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Received on Tuesday, 24 October 2006 12:31:16 GMT

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