Types of data warehousing
Middleware tools: a single interface to a distributed network of data sources (data stores, departmental data warehouses)
Requires a common protocol
Difficulty is that the nodes on this network tend to be incompatible and have heterogeneous data
Departmental data warehouses: contain data prepared for and relevant to specific areas and functionalities
Tend to be customized and work well in specific domains
Tend not to work well with warehouses in other domains
III. Examples of web services
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