The MLPQ/GIS Constraint Database System Peter Z. Revesz, Rui Chen, Pradip Kanjamala, Yiming Li, Yuguo Liu, and Yonghui Wang   View Paper (PDF)     View Demo (HTML)   Return to Demonstrations Abstract MLPQ/GIS [4,6] is a constraint database [5] system like CCUBE [1] and DEDALE [3] but with a special emphases on spatio-temporal data. Features include data entry tools (first four icons in Fig. 1), icon-based queries such as Intersection, Union, Area, Buffer, Max and Min, which optimize linear objective functions, and Q for Datalog queries. For example, in Fig. 1 we loaded and displayed a constraint database that represents the midwest United States and loaded two contraint relations describing the movements of two persons. The query icon opened a dialog box into which we entered the query which finds (t, i) pairs such that the two people are in the same state i at the same time t. MLPQ/GIS can animate [2] spatio-temporal objects that are linear constraint relations over and t. Users can also display in discrete color zones (isometric maps) any spatially distributed variable z that is a linear function and For example, Fig. 2 shows the mean annual air temperature Nebraska. Animation and isometric map display can be combined. References Note: References link to DBLP on the Web. [1] Alexander Brodsky , Victor E. Segal , Jia Chen , Pavel A. Exarkhopoulo : The CCUBE Constraint Object-Oriented Database System. SIGMOD Conference 1999 : 577-579 [2] Jan Chomicki , Yuguo Liu , Peter Z. Revesz : Animating Spatiotemporal Constraint Databases. Spatio-Temporal Database Management 1999 : 224-241 [3] Stéphane Grumbach , Philippe Rigaux , Luc Segoufin : The DEDALE System for Complex Spatial Queries. SIGMOD Conference 1998 : 213-224 [4] ... [5] Paris C. Kanellakis , Gabriel M. Kuper , Peter Z. Revesz : Constraint Query Languages. JCSS 51(1) : 26-52(1995) [6] Peter Z. Revesz , Yiming Li : MLPQ: A Linear Constraint Database System with Aggregate Operators. IDEAS 1997 : 132-137 BIBTEX @inproceedings{DBLP:conf/sigmod/ReveszCKLLW00,   author    = {Peter Z. Revesz and                 Rui Chen and                 Pradip Kanjamala and                 Yiming Li and                 Yuguo Liu and                 Yonghui Wang},    editor    = {Weidong Chen and                 Jeffrey F. Naughton and                 Philip A. Bernstein},    title     = {The MLPQ/GIS Constraint Database System},    booktitle = {Proceedings of the 2000 ACM SIGMOD International Conference on                 Management of Data, May 16-18, 2000, Dallas, Texas, USA},    journal   = {SIGMOD Record},    publisher = {ACM},    volume    = {29},    number    = {2},    year      = {2000},    isbn      = {1-58113-218-2},    pages     = {601},    crossref  = {DBLP:conf/sigmod/2000},    bibsource = {DBLP, http://dblp.uni-trier.de} } }, DiSC'01 Copyright ©2002 ACM Inc.