www.getty.edu
with OAI-PMH
doc1; last mod
2003-03-12
doc2; last mod
2002-07-19
doc3; last mod
2003-11-29
doc4; last mod
2002-10-03
doc100; last mod
2003-09-113
…
what documents have been
modified since 2003-11-15?
A More Efficient Way…