Re: [Xsltforms-support] Binding to optional element

[Klotz, L. <Lei...@xe...>]

Another option, though with UI ramifications.  It uses a select1 for the named cases and a button for the default case.
And the new insert/delete attributes in XForms 1.1.

I've not tested this, but it's from http://www.w3.org/TR/xforms/#data-mutation-patterns

<instance id="data">
  <data xmlns=""><format>XML</format></data>
</instance>

<instance id="prototypes">
  <data xmlns=""><format>XML</format></data>
</instance>

<group ref="/root/format">
  <select1 ref=".">
    <label>Format: </label>
    <item><label>XML</label><value>xml</value></item>
    <item><label>Text</label><value>text</value></item> 
    <item><label>Binary</label><value>binary</value></item>
    <item><label>Default</label><value /></item>
    <delete ev:event="xforms-value-changed" if=". = ''" nodeset="." />
  </select1>
</group>

<trigger ref="/root[not(format)]">
  <label>Set Format</label>
  <insert ev:event="DOMActivate" context="/root" nodeset="format" origin="instance('prototypes')/format" />
</trigger>
    
-----Original Message-----
From: Micah Dubinko [mailto:Mic...@ma...] 
Sent: Tuesday, January 19, 2010 11:58 AM
To: xsl...@li...
Subject: [Xsltforms-support] Binding to optional element

Hey everyone,

This was difficult to do in XForms 1.0. What's the latest state of the art?

Say I have an XML instance like this:
<root>
   <format>xml</format>
</root>

Possible values for the format element are "xml", "text", "binary", or a default setting, indicated by a complete absence of the <format> element. I'd like this to attach to a select1 with four choices:

<xf:select1 ref="format">...

* xml
* text
* binary
* default

Where the first three set the value of the <format> element, and the fourth omits the element altogether. In XForms 1.0, the difficulty comes from binding to a nonexistent element. Are there features from 1.1, 1.2, or XSLTForms that make this case easier? Anyone have an example?

Thanks! -m


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