The adoption of shared or interoperable standards for legal information represents an important precondition for enabling access, communication, processing, and integration of legal sources through IT technologies, in an open and cooperative framework. The annual workshop on Legislative XML is the most significant European event in the domain of standards for legal information. This volume collects the contributions presented at the V Legislative XML Workshop, hosted by EUI (the European University Institute of Florence) and organised by EUI in cooperation with ITTIG-CNR (the Institute of Legal Information Theory and Techniques of the Italian National Research Council) and CIRSFID (the Legal Informatics Centre of the University of Bologna). The workshop has been characterised by a large and diverse participation: more than 100 people from more 20 countries (and 4 continents, Europe, North America, South America, and Africa) were present, coming form public administrations (national and regional parliaments and governmental bodies), academic institutions and IT companies.