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Binding : Do I need a nodeset?

From: Adam Flinton <adam.flinton@nhs.net>
Date: Thu, 6 Aug 2009 12:58:13 +0100
Message-ID: <4A7AC555.20504@nhs.net>
To: "www-forms@w3.org" <www-forms@w3.org>
Dear All,

I have a couple of groups one for editing (i.e. uses input fields) & one
for readonly (ie only uses output fields).

Which to show is determined by binding to a bind which has a "relevant"
attrib set e.g.

       <xforms:bind id="OID_EDIT"
relevant="instance('OIDVals')//oids[1]/@active = 0 and
instance('systemInformation')//@nodeEditable[1] = 1"
nodeset="instance('systemInformation')//@localEdit[1]"/>
        <xforms:bind id="OID_NO_EDIT"
relevant="instance('OIDVals')//oids[1]/@active = 1 and
instance('systemInformation')//@nodeEditable[1] = 1"
nodeset="instance('systemInformation')//@localNoEdit[1]"/>

& then:

<xforms:group appearance="minimal" bind="OID_EDIT" id="OID_Group_Editable">

etc.

I can only seem to get it to work (in Chiba) is via having a nodeset
which is just there to bind to. I.e. I create 2 dummy/empty attributes
within an instance & use them as the nodeset reference.

Do I need a nodeset ?

e.g. should

     <xforms:bind id="OID_EDIT"
relevant="instance('OIDVals')//oids[1]/@active = 0 and
instance('systemInformation')//@nodeEditable[1] = 1" />
     <xforms:bind id="OID_NO_EDIT"
relevant="instance('OIDVals')//oids[1]/@active = 1 and
instance('systemInformation')//@nodeEditable[1] = 1" />

Work in the same way?

It appears to work for calculated values e.g.

<xforms:bind id="CountOv" calculate="count(instance('OIDVals')//ov)"/>

So are there any rules wrt binding & when you need a nodeset & when you
don't?

TIA

Adam

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Received on Thursday, 6 August 2009 11:59:20 GMT

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