XML: from practice to theory Victor Vianu   View Paper (PDF)   Return to XML: from practice to theory Abstract The development of XML technology has occurred very rapidly, initially leaving theory behind. As is often the case in such situations, practical development sometimes seemed more ad-hoc than well principled. There is now a substancial body of work providing formal foundations for XML. This paper presents a personal perspective on some recent developments in the theory of XML. ©2004 Association for Computing Machinery