a - value rw defined by sys1
b - value rw defined by sys2
c - value rw defined by sys1 and sys2
d - value ro defined by sys1
e - value ro defined by sys2
f - value ro defined by sys1 and sys2
a - no value ro defined by sys1
b - no value ro defined by sys2
c - no value ro defined by sys2 and value ro defined by sys1
c - no value ro defined by sys2 and value rw defined by sys1
Returns the portlet URL string representation to be embedded in the
markup.
Note that the returned String may not be a valid URL, as it may
be rewritten by the portal/portlet-container before returning the
markup to the client.