Research Problems in Data Warehousing

• I went to citeseer and asked for knowledge management.
• The second most cited was Research Problems in data warehousing (and it's just 6 pages).
• It's from 1995, so is a bit out of date.
• She starts with the lazy approach to querying multiple databases and contrasts this with the eager approach (data warehousing).
• Problems with Wrapper/Monitors center around change detection. Automatic or semi-automatic wrapper generator.
• Problems with Integrators include scrubbing, view maintenance, and view consistency with data update.
• Problems with the warehouse center on triggers.
• Problems with optimizations include filtering updates and multiple view optimization.
• There is no apparent research methodology here.