If your mashup script invokes SQL queries or statements directly, you typically refer to named datasources that have already been configured in the MashZone NextGen Server called implicit datasources. If needed, you can explicitly declare a <datasource> with connection information for a database directly in the mashup script. You can use several named datasources in a mashup script as well as a single, explicitly declared, default datasource.

The advantages, disadvantages and configuration requirements for implicit and explicit datasources include:

Using implicit named datasources in EMML is a best practice. See also Named Datasources versus the Default Datasource for more information.

See Explicitly Defining the Connection and Dynamic Connections for instructions on declaring datasources explicitly. See Working Samples for information on mashup samples for datasources.