OAI-PMH in XQuery

Thanks for the nod, Winona. Hopefully you folks will get some good use out of the XQuery-based OAI-PMH data provider I’ve been working on.

I just want to clarify that only one small bit of the code is specific to X-Hive, and that’s a call to an extension that gets last-modified dates from the X-Hive service. We do not reliably store this information in the metadata itself, and so I needed to go this route. Some folks do store this in MODS or elsewhere in descriptive or administrative metadata. It should be a two-line change to short-circuit this behavior (xhive-exts:last-update() is only invoked in two places, I believe).

I’m currently working on adding EAD support, modularizing things a bit more, and streamlining configuration. resumptionTokens will come after that, I hope.

I’ll be interested to hear more of UVM’s implementation and how I can make this thing more useful to others.