VegBank

When XML is being loaded into the database, accessionCodes exist in the user's XML document that come from the user's VegBranch database. As new items are loaded into the database, corresponding records are added to the userDatasetItem table to indicate what was loaded in a particular XML file. There is a field on userDatasetItem called externalaccessioncode which is used to store accessioncodes from other databases (VegBranch, some other version of VegBank, perhaps some other GUID?). It needs to be populated, but isn't yet.