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State-of-the-art database systems manage and process a variety of complex objects, including strings and trees. For such objects equality comparisons are often not meaningful and must be replaced by similarity comparisons. This book describes the concepts and techniques to incorporate similarity into database systems. We start out by discussing the properties of strings and trees, and identify the edit distance as the de facto standard for comparing complex objects. Since the edit distance is computationally expensive, token-based distances have been introduced to speed up edit distance...

The 1999 Workshop on Spatio-Temporal Database Management, held in Ed- burgh, Scotland, September 10 11, 1999, brought together leading researchers anddevelopersintheareaofspatio-temporaldatabasestodiscussthestate-- the-art in spatio-temporal research and applications and to understand the new challenges and future research directions in this emerging and rapidly advancing area. The workshop served as a forum for disseminating research and expe- ence in spatio-temporal databases and for maximizing interchange of knowledge among researchers from the established spatial and temporal database...

The TCGOV 2005 international conference on e-government was held at the Free University of Bozen-Bolzano during March 2-4, 2005. The conference was initiated by the working group "Towards Electronic Democracy" (TED) of the European Science Foundation and was jointly organized by the Free University ofBozen-Bolzano, theMunicipalityofBozen-Bolzano, theTEDWorkingGroup, and the IFIP Working Group 8.5. The conference addressed a large spectrum of issues that are relevant and have to be investigated for a successful transition from the traditional form of government to a new form known as...