[OAI-implementers] Resumption Token Expiring.

[Jose Blanco]

I am trying to avoid using a database to determine if our resumptionToken
has expired, and I am finding it impossible. A resumption Token may appear
perfectly valid, but because portion our data may have been updated, it
really is not valid.  It is very difficult to determine when the data is
updated, unless this information where kept in a database.  Fortunately the
updates are infrequent, but none the less this situation can occur.  Can any
of you share your thoughts on this?

Thanks,
Jose