how do I select a specific number of nodes from a tree

I want to express the following as XSL, could anybody help?

"From a given position in a tree select the next 10 children."

the tree might look like:

<root>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        <child .../>
        


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