question: public void delete ( String name ) throws IOException { if ( name . equalsIgnoreCase ( QUALIFIERS ) ) { policyQualifiers = Collections . emptySet ( ) ; } else if ( name . equalsIgnoreCase ( ID ) ) { throw new IOException ( "Attribute ID may not be deleted from " + "PolicyInformation." ) ; } else { throw new IOException ( "Attribute name [" + name + "] not recognized by PolicyInformation." ) ; } }
target:  Delete the attribute value.