Subject Re: ePTID comparison
From "David L. Wasley" <dlwasley@xxxxxxxxxxxxx>
Date Thu, 27 Aug 2009 11:48:47 -0700

Andrew,  I think what you are describing is eduPersonAffiliation, not epTID.

Clearly the eP spec is U.S. centric (sorry about that) and we didn't consider a hierarchy when defining that object. In our institutions and student may also be an employee. Faculty is a partially overlapping set with employee (some teachers are not paid employees) and/or student (some teachers are grad students) so the distinction is more along the lines of 'functional role' than any sort of hierarchy.

"Member" is a derived value and can mean different things at different campuses. In general, it is someone who is considered eligible for campus funded services.

Perhaps we need qualifiers (adjectives) on these values.


At 3:01 PM +0100 on 8/27/09, Andrew Cormack wrote:

At the meeting in Malaga Mikael pointed out that the use of the ePTID
values "staff" and "employee" was significantly different, to the extent
that they are at different locations in the hierarchy of values, between
the HAKA and UK federations. In the UK "employee" is a sub-class of
"staff" whereas in HAKA "staff" is a subset of "employee"! This has
probably arisen because the eduPerson spec doesn't state the
relationship between these values. I offered to look at other
federations' definitions to see which values were used in a consistent
way, and which weren't.

The preliminary results, for the federations whose schemata are
available from the refeds wiki, are attached. I hope the diagrams are
obvious - values on the right-hand side are subsets of those to the left
of them.

In fact there are only four federations for which I could work out the
complete hierarchy, and those have four different variations!

Please could RENATER and SWITCH confirm that I have understood their
definitions correctly? In particular for SWITCH I'm not clear whether or
not someone who is "alum" is also "member"; for RENATER (who otherwise
have the clearest definition - thanks), please could you confim whether
"retired" and "emeritus" get "member" as well?

Of the other federations, the links from AAF and don't seem to
be accessible to non-members; SIR, AAI@EduHr and SURFnet don't make it
clear what their hierarchy of values is; and FEIDE, Swamid, and InCommon
refer to the original eduPerson specification, which is silent on the
question of hierarchy. If any of those would like to let me know what
their hierarchies look like then I'd be delighted to add them.

The good news is that "affiliate", "alum", "student", "faculty" and
"walk-in-user" seem to be used consistently; the bad news is that
"staff", "employee", and possibly "member" don't.

Andrew Cormack, Chief Regulatory Adviser
JANET(UK), Lumen House, Library Avenue, Harwell Science and Innovation
Campus, Didcot, OX11 0SG, UK
Phone: +44 (0) 1235 822302
Fax: +44 (0) 1235 822399

JANET, the UK's education and research network

JANET(UK) is a trading name of The JNT Association, a company limited
by guarantee which is registered in England under No. 2881024
and whose Registered Office is at Lumen House, Library Avenue,
Harwell Science and Innovation Campus, Didcot, Oxfordshire. OX11 0SG

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