G. Bergman. (2016)cite arxiv:1602.00034Comment: Comments: 50 pages. Main change from version 2: Lemma 26 strengthened to include contractibility statement which in previous version was noted as "likely" in paragraph following that result. Several small typoes also corrected.
J. Smith, M. Naphade, and A. Natsev. Multimedia and Expo, 2003. ICME '03. Proceedings. 2003 International
Conference on, 2, page II--445-8 vol.2. (2003)
M. Sanderson, and B. Croft. 22nd Annual Internation ACM SIGIR Conference on Research and Development in Information Retrieval, page 206--213. Berkeley, California, United States, ACM Press, (1999)
W. Kollewe, M. Skorsky, F. Vogt, and R. Wille. Begriffliche Wissensverarbeitung-Grundfragen und Aufgaben, page 267-288. Mannheim, B. I. -Wissenschaftsverlag, (1994)
K. Becker, G. Stumme, R. Wille, U. Wille, and M. Zickwolff. Knowledge Engineering and Knowledge Management. Methods, Models, and Tools., volume 1937 of LNAI, page 352-365. Heidelberg, Springer, (2000)
S. Göbel, M. Heidemann, U. Jasnoch, and G. Stumme. Hypermedia im Umweltschutz. 3. Workshop in Ulm 2000, Umwelt-Informatik aktuell, Bd. 24, page 169-179. Marburg, (2000)
M. Skorsky, G. Stumme, R. Wille, and U. Wille. Proc. Workshop on Knowledge Management, Organizational Memory and Reuse, 5th German Conf. on, Würzburg, (March 1999)
K. Becker, G. Stumme, R. Wille, U. Wille, and M. Zickwolff. Knowledge Engineering and Knowledge Management. Methods, Models, and Tools., volume 1937 of LNAI, page 352-365. Heidelberg, Springer, (2000)