Hi all, Please find attached a pdf that I hope summarises the flat vs nested XML renderings and their pros/cons. The pdf also includes some other (less important) style choices for the flat rendering (i.e. whether to use Grouping elements, BaseType attributes or both). I have tried to include all recent comments. Cheers, David ========================== David Meredith Scientific Computing Technology eScience Daresbury Laboratory Tel: +44 (0) 1925 603762 Fax: +44 (0) 1925 603100 (Site) Email: david.meredith@stfc.ac.uk Skype name: davidismeredith -- Scanned by iCritical.