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Instead of looking up a row by its primary key value (say country code), you can also look it up by an alternate key (say country name).
To do this, you need to define the Alternate key on the entity object (general tab), and then on the view object, also on the general tab.
In the Jheadstart altKeyName<GroupName> parameter you can then specify the name of this view object alt key. In the rowKeyValue parameter you then specify the value of the alternate key attribute (country name).
See also the source of SetCurrentRowBean class.