I would like to populate a drop list with options from an XML doc. However each option has disply/no-display conditions.

How can I execute the xpath query contained in the doc and check the true/false result condition?

ie(
 <optionNodeRoot>
    <option>
        <value>blah1</value>
        <show>../../stepID = 1</show>
    </option>
    <option>
        <value>blah2</value>
        <show>../../stepID = 2</show>
    </option>
    <option>
        <value>blah3</value>
        <show>../../stepID = 3</show>
    </option>
</optionNodeRoot>

There's no standard way of doing dynamic XPath evaluation in XSLT (1.0 or 2.0). A number of products have an extension function, usually called xx:evaluate(). Saxon also has saxon:evaluate-node() which is designed specifically for the use case where the XPath expression is within a source document and relative to the node it is contained in. Alaternatively, call out to a selectSingleNode() or similar method in JavaScript.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

Great, thanks for the reply. I'll look up usage of the evaluate() function available in InfoPath 2003