+It is possible to request single data sources from a specific I<RRDCacheD>, see
+L<rrdcached(1)>, using the C<:daemon=I<E<lt>addressE<gt>>> parameter. The
+value given to this parameter follows the same syntax as other means to specify
+the address of the caching daemon. It is described in detail in the
+L<rrdcached(1)> manual page. Beware, however, that colons (in IPv6 addresses
+and as a port separator, for example) need to be escaped using a backslash.
+