XPath / XQuery issue with selecting nodes NOT containing a value.

Trying to xinclude content.

This is the data (it is a list of properties to a class) ...

    <classsynopsisinfo role="comment">&Properties;</classsynopsisinfo>
    <fieldsynopsis>
     <modifier>protected</modifier>
     <type>string</type>
     <varname linkend="exception.props.message">message</varname>
    </fieldsynopsis>
    <fieldsynopsis>
     <modifier>private</modifier>
     <type>string</type>
     <varname linkend="exception.props.string">string</varname>
    </fieldsynopsis>
    <fieldsynopsis>
     <modifier>protected</modifier>
     <type>int</type>
     <varname linkend="exception.props.code">code</varname>
    </fieldsynopsis>
    <fieldsynopsis>
     <modifier>protected</modifier>
     <type>string</type>
     <varname linkend="exception.props.file">file</varname>
    </fieldsynopsis>
    <fieldsynopsis>
     <modifier>protected</modifier>
     <type>int</type>
     <varname linkend="exception.props.line">line</varname>
    </fieldsynopsis>
    <fieldsynopsis>
     <modifier>private</modifier>
     <type>array</type>
     <varname linkend="exception.props.trace">trace</varname>
    </fieldsynopsis>


I now want to document a sub-class. In the sub-class private properties are not to be shown.

To include all the properties, the following tag works just fine.

<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.exception')/descendant::db:fieldsynopsis" />


What I want to do is exclude nodes which have a <modifier>private</modifier> sub-node.

I thought the following would work, but it doesn't.

<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.exception')/descendant::db:fieldsynopsis[modifier!=private]" />


I also need to extend the same logic to ...

<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.exception')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis)" />


In both cases, I'm getting the private properties/methods and I want to exclude them.


Any ideas?

Regards,

Richard.