Hi,
Yes the initial implementation of the Organism table went for a simplified 'Darwin Core' standard of linking, which sticks to the major ranks and omits the intermediates. We aim to include these intermediate ranks eventually but they tend to be the ones that change most frequently and which are up for more debate.
Best wishes,
Chris R.
Chris Raper, Manager of the UK Species Inventory, Angela Marmont Centre for UK Biodiversity,
Natural History Museum, Cromwell Road, London, SW7 5BD. (tel: 020 7942 5894)
also Tachinid Recording Scheme (http://tachinidae.org.uk/)