@techreport{TUW-140279, author = {Wimmer, Manuel and Schauerhuber, Andrea and Kramler, Gerhard}, title = {From Document Type Definitions to Metamodels: The WebML Case Study}, institution = {E194 - Institut f{\"u}r Information Systems Engineering; Technische Universit{\"a}t Wien}, year = {2006}, url = {http://publik.tuwien.ac.at/files/pub-inf_3850.pdf} }