the component does not match <TT><I>S</I></TT>.</P>

	<P>Note that, while most library components export a single structure,
	their export is <I>not</I> simply that structure, but a structure that
	<I>contains</I> that structure. For instance, in order to link the
	<TT><A href="text-io.html">TextIO</A></TT> component manually, the
	following call to <TT>Link</TT> is necessary:</P>
	<PRE>
	structure TextIOComp = Link (val url = Url.fromString "x-alice:/lib/system/TextIO"
	                             signatu