Must be a better way to write this XPath expression

Hi,

Given:

<data>
        <stuff>
                <a>
                        ...lots in here...
                </a>
                <b>
                        ...lots in here...
                </b>
                <c>
                        ...lots in here...
                </c>
                <d>
                        ...lots in here...
                </d>
        </stuff>
</data>

In my XSL to get sections 'a' and 'b' I would have thought something like:

/data/stuff/(a|b)

would work but the only thing I can get to work is:

/data/stuff/a|/data/stuff/b

which just seems too long winded for there not to be a better way to 
express it.

Thanks

Si


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