[Xsltforms-support] Binding to optional element

[Micah D. <Mic...@ma...>]

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