Undapted concepts

Hi Graham,

I relinquish the lock with the attached update.

Changes:

- my name to include middle initial, e-mail and links
- added some of Frank's text to 2.4.1, with new ref to Sowa2
- updated 3.1 URI Ref to be very like XML Namespaces 1.1 section 7 IRI
- updated 3.2 using majority text with little bits from minority text
- added acknowledgement to my host in Pisa
- added Sowa2 ref

Jeremy