*/
public void createLevelMap(Level _lev, Vector _keys, Vector _columns)
{
// Map the keys of the relational table to the level.
DimensionMapGroup _dmg = _lev.createSourceDimensionMapGroup();
DimensionKeySourceExpression _key = _dmg.CreateKeyMap();
for (int y=0; y < _keys.size(); y++)
{
SourceColumn _keycol = _key.CreateSourceColumn();
_keycol.setColumn((String)_keys.elementAt(y));
}
// Map the columns of the relational tables or views to the
// AttributeProjection objects.