what is dso's aggregator?what relation between aggregator
and the third party provider? where are I can find more
materials about aggregator, it seem fail when search it in
sql server help.

DSO is the object model for creating and managing Analyis Services objects
on the server. There's no direct relationship between DSO and the part of
Analyis Server (sometimes referred to as the "aggregator") that supports
plugging in of third-party aggregated providers.

See the document
http://www.msnusers.com/AnalysisServicesDataMining/Documents/Files/DMAggregator
white paper.zip for more information on DM aggregation (item 29 under the
FAQ (http://groups.msn.com/AnalysisServicesDataMining/faq.msnw).

--
Raman Iyer
SQL Server Data Mining
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