using com.apama.dataview.DataViewAddDefinition;
using com.apama.dataview.DataViewException;
...
DataViewAddDefinition add := new DataViewAddDefinition;
add.dvName := "Weather";
add.dvDisplayName := "Weather";
add.fieldNames := ["location","temperature","humidity","visibility"];
add.fieldTypes := ["string","integer","integer","integer"];
add.keyFields := ["location"];
route add;
DataViewException dvException;
on all DataViewException(): dvException {
log "*** Weather monitor error: " +
   dvException.toString() at ERROR;
}