FC compliant as long as the
 scheme is the same as the scheme of the base URL. If the base URL is null
 a 'file:' URL referencing the current directory is used as the base URL.
 If the method is successful it will return a Source of type
 <CODE>StreamSource</CODE> with its SystemID set to
 the resolved URL used to open the underlying InputStream.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>resolve</CODE> in interface <CODE>javax.xml.transform.URIResolver</CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><