Converts this feed to an XML element.
Converts this feed to an XML element.
Feed parameters equal to None
will not be included in the XML element.
the resulting XML element
A copy of this feed with a new time stamp, if available.
A copy of this feed with a new time stamp, if available. It is implementation dependent, what happens if this feed has no time-stamp parameter or multiple ones, but in any case you get some -- maybe identical -- copy of this feed.
the new time stamp
a copy of this feed with a new time stamp