GSS_C_NO_NAME 

The recommended symbolic name GSS_C_NO_NAME indicates that no name is being passed within a particular value of a parameter used for the purpose of transferring names. 

GSS_C_NO_OID 

This value corresponds to a null input value instead of an actual object identifier. Where specified, it indicates interpretation of an associated name based on a mechanism-specific default printable syntax. 

GSS_C_NT_ANONYMOUS 

Provided as a means to identify anonymous names, and can be compared against in order to determine, in a mechanism-independent fashion, whether a name refers to an anonymous principal. 

GSS_C_NT_EXPORT_NAME 

A name that has been exported with the gss_export_name() function.

GSS_C_NT_HOSTBASED_SERVICE 

This name type is used to represent services associated with host computers. This name form is constructed using two elements, "service" and "hostname,” as follows: service@hostname.

GSS_C_NT_MACHINE_UID_NAME 

This name type is used to indicate a numeric user identifier corresponding to a user on a local system. Its interpretation is OS-specific. The gss_import_name() function resolves this UID into a username, which is then treated as the User Name Form.

GSS_C_NT_STRING_STRING_UID_NAME 

This name type is used to indicate a string of digits representing the numeric user identifier of a user on a local system. Its interpretation is OS-specific. This name type is similar to the Machine UID Form, except that the buffer contains a string representing the user ID. 

GSS_C_NT_USER_NAME 

A named user on a local system. Its interpretation is OS-specific. It takes the form: username.