Hi, my impression is that XML database systems are not (yet) suitable for our purposes. If we accept the limitation I've previously mentioned ("non-recursive" data), a RDBMS is well suited to store data-centric XML data, whereas XML databases are mainly written to make document-centric XML data accessible. In most cases XML database systems (especially the freely available ones) lack things like transactions and referential integrity that we take for granted with an RDBMS. We also have to keep in mind that RefDB is more than a database to store references. Most people will also not feed it with 23 million datasets. This may explain the different points of view expressed by the LoC people. regards, Markus Bruce D'Arcus writes: > > IIRC, you're lurking here Markus; yes? Any thoughts of the relevance of > Karen's comments to RefDB 2? > > Bruce > -- Markus Hoenicka [log in to unmask] (Spam-protected email: replace the quadrupeds with "mhoenicka") http://www.mhoenicka.de