In Orbeon 4.4 Form Builder, I\'d like to be able to add a hyperlink control to a form, where the target URL is constructed partially from values available in other form fields.
You can use attribute value templates in xf:load/@resource attributes like you've done in the simple link:
xf:load/@resource
<xf:action ev:event="DOMActivate"> <xf:load show="new" resource="{xxf:bind('url-field-bind')}"/> </xf:action>