I should mention that I am on vacation next week ( 14th to 18th of August ) so will not be able to respond to posting during that time but will hopefully be fresher and sharper when I return! All the best, Roger -- ------------------------------------- Roger Hyam Technical Architect Taxonomic Databases Working Group ------------------------------------- http://www.tdwg.org roger@tdwg.org +44 1578 722782 -------------------------------------