By default, Data Mart stores a single point in time snapshot of your business data based on a single source rule. This data is periodically refreshed from Eagle's data warehouse during the submit process. See Submitting Submit a Model as Ad Hoc for details.
You can create multiple snapshots of your Mart data, each one using data sources that are relevant to one or more business purposes. For example, suppose your organization runs a pension fund. You can create a snapshot that looks at fund activity from a custodian's view point and another snapshot that looks at fund activity from a manager's view point. You can also use snapshots to report on the same portfolios in different accounting basis. These zdifferent different perspectives must exist as different data sources in your data warehouse.
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