, but
        matches the component's export against the signature <TT><I>S</I></TT>
	and returns the export module itself. Raises
	<TT><A href="component.html#Failure">Component.Failure</A></TT> with
	<TT><A href="component.html#Mismatch">Component.Mismatch</A></TT> as
	cause if the component does not match <TT><I>S</I></TT>.</P>

	<P>Note that, while most components may export a single structure,
	their export is <I>not</I> simply that structure, but a structure that
	<I>contains</I> that structure
	(cf. 