<listitem>
<para>A string or pathname specifying the library location
in the filesystem. At least one implementation (&lw;) can not
-accept a logical pathname.
+accept a logical pathname. If this parameter denotes a pathname without a
+directory component then most of the supported Lisp implementations will be
+able to find the library themselves if it is located in one of the standard
+locations as defined by the underlying operating system.
</para>
</listitem>
</varlistentry>