Query discovery for schema mapping
For this class we'll be discussing two papers:
How to read the first paper:
Renée J. Miller, Laura M. Haas, Mauricio A. Hernández: Schema Mapping as Query
Discovery. VLDB 2000: 77-88. We're reading this paper to give us
a good introduction to the problem of finding queries to fill in the
details of those correspondences we've been finding so far.
L. Popa, Y. Velegrakis, M. Hernandez, R. J. Miller, and R. Fagin, Translating Web Data., in 28th
International Conference for Very Large Databases (VLDB 2002), August
2002. We are reading this paper because it gives a later snapshot of
work by many of the same authors and also concentrates on the slightly
different application of translating web data.
The second paper should be straightforward to understand given the
caveats for the first paper.
- pay close attention to the key principles they're using to guide
the mapping construction (bottom of first column of the fourth page -
the page is numbered 80)
- In section 2.3, don't worry about the concept of dominance
preserving mappings - we'll be discussing that later.
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