Signo is a website devoted to Applied Semiotic Theories. The study of Signs, Semiotics is the primary purpose of this site and explains various semiotic theories.
M. Yang, B. Wildemuth, and G. Marchionini. MULTIMEDIA '04: Proceedings of the 12th annual ACM international conference on Multimedia, page 368--371. New York, NY, USA, ACM, (2004)
S. Ornager. SIGIR '95: Proceedings of the 18th annual international ACM SIGIR conference on Research and development in information retrieval, page 212--218. New York, NY, USA, ACM, (1995)
V. Malaise, L. Hollink, and L. Gazendam. Proceedings of the Workshop on Semantic Search (SemSearch 2008) at the 5th European Semantic Web Conference (ESWC 2008) Tenerife, Spain, June 2nd, 2008, page 44--58. (2008)