Portability must be included as part of a thoroughgoing review/rewrite of the section of eduPerson (200806) on "Identifier Concepts:"
1) uniqueness
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Look at reassignment. It has to do with practices at the IdP, whether an identifier continues to apply to the same entity or can be used for a different one. The identifier stays the same, it's the mapping to the "real world entities" that might change. So the model needs to include those entities, the IdM system that maintains (or doesn't) the mapping, and the interest of the RP in the continuity of the mapping. |
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Here's a trial run with further revisions (dependency is indicated by indentation)
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Properties of Identifier Usage | ePPN | UUID | PVI | ePTID |
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– Scope | wisc.edu | wisc.edu | wisc.edu | wisc.edu |
| within scope | global | within scope | global |
– Reversible | reversible | reversible | reversible | reversible |
– Persistence | persistent | persistent | persistent | persistent |
– Transparency | transparent | opaque | opaque | opaque |
| palatable | no | palatable | no |
– Mutable | mutable on approved user request | mutable only in case of mistaken identity | mutable only in case of mistaken identity | mutable |
| potentially | no | potentially | no |
| resynchable | no | no | resynchable |
– Correlatable | correlatable | correlatable | correlatable | only within specific application group |
– Portable | no | potentially | no | no |
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