Read and write property determining the type of identifier this object uses. Possible values for this property are the following:

•0 - nitNumeric: Identifier is a number (LONG)

•1 - nitString: Identifier is a String

•2 - nitGUID: Identifier is a GUID-type (Globally Unique Identifier) String

•3 - nitOpaque: Identifier is an array of bytes

Whenever this property changes, the identifier value is forced to Null.