... Concepts¹¹

Correspondence may be directed to the electronic mail distribution, tdbglossary@cs.arizona.edu, or to the editor C. S. Jensen, at Aalborg University, Datalogi, Fr. Bajers Vej 7E, DK–9220 Aalborg ├ÿ, Denmark, csj@iesd.auc.dk. The affiliations and e-mail addresses of the many contributors may be found in a separate section at the end of the document.