---------------------------------------------------------------------
  CLASS: EAPrefix     --DVM
  PUBLIC METHODS:
    EAPrefix()       - Constructor requires an offset into the
                     enclosing structure. 
    operator!=()     - False if equal
    attrType()       - Gets/sets the value of the attrType field.
    attrSubtype()    - Gets the value of the attrSubtype field.
    attrType()       - Getter/setter
    attrLen()        - Getter/setter
    void clear()     - Clears out all fields except for attrType
    void toISO()     - Copies contents to supplied byte pointer
    void fromISO()   - Initializes contents from byte pointer
    checkValidity()  - Checks reasonableness of fields.
 
  USAGE NOTES:
   User notes go here.
  
 ----------------------------------------------------------------------