+ - Scan handler is now passed RPN as well as TERM, a tree of
+ Perl structures representing the entire scan clause
+ including access-points and other attributes (which are
+ discarded from TERM).
+ - The various classes used to represent nodes in the RPN query
+ tree (Net::Z3950::APDU::Query, Net::Z3950::RPN::And,
+ Net::Z3950::RPN::Or, Net::Z3950::RPN::AndNot,
+ Net::Z3950::RPN::Term and Net::Z3950::RPN::RSID) now all
+ share a newly introduced superclass Net::Z3950::RPN::Node,
+ making it possible to write methods that apply to all node
+ types.
+ - A utility method toPQF() is provided for
+ Net::Z3950::RPN::Node, enabling the RPN tree to be converted
+ back into a flat PQF query.
+ - Add support for the Delete Result Set service.
+ - Add documentation for the Sort service.
+ - Some clarifications to documentation.