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» Complete Geometrical Query Languages
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DBPL
1999
Springer
101views Database» more  DBPL 1999»
13 years 11 months ago
On the Power of Incremental Evaluation in SQL-Like Languages
We consider IES(SQL), the incremental evaluation system over an SQL-like language with grouping, arithmetics, and aggregation. We show that every second order query is in IES(SQL) ...
Leonid Libkin, Limsoon Wong
AAAI
2008
13 years 9 months ago
Using a Geometric-Based Sketch Recognition Approach to Sketch Chinese Radicals
Unlike English, where unfamiliar words can be queried for its meaning by typing out its letters, the analogous operation in Chinese is far from trivial due to the nature of its wr...
Paul Taele, Tracy Hammond
SMA
1997
ACM
120views Solid Modeling» more  SMA 1997»
13 years 11 months ago
The Generic Geometric Complex (GGC): A Modeling Scheme for Families of Decomposed Pointsets
: Modeling of families of geometric objects is a major topic in modern geometric and solid modeling. Object families are central to many important solid modeling applications, incl...
Ari Rappoport
IFIP
1998
Springer
13 years 11 months ago
One Sided Error Predicates in Geometric Computing
A conservative implementation of a predicate returns true only if the exact predicate is true. That is, we accept a one sided error for the implementation. For geometric predicate...
Lutz Kettner, Emo Welzl
ACTA
2002
111views more  ACTA 2002»
13 years 7 months ago
Adding a path connectedness operator to FO+poly (linear)
In the constraint database community, FO+poly and FO+linear have been proposed as foundations for spatial database query languages. One of the strengths of this approach is that t...
Chris Giannella, Dirk Van Gucht