Icarus Class: MetaRDBLocation
Describes an rdb location.
schemaName  
  Name of the rdb schema.
tableName  
  Name of the rdb table.
columnName Attribute may stay unnamed in attribute list.Attribute value must be specified.
  Name of the rdb column.
isSeq  Attribute has a default value. 0
  Shows whether the column retrieves its value from a sequence.
constraint  
  Column constraint string