A disadvantage with a provenance system is that frequent reorganizations of the federal government have scattered publications by some departments and agencies. Documents relating to education are a good example of this. We started comprehensively cataloging documents in 1996. Now everything is cataloged and barcoded. All items cataloged in the SuDocs classification have DOCS before the call number in Addison.
Many items are out there but have no cataloging at all.
Some effort is being made by Technical Services to go back and catalog these items but it will be a long time before they get close to finishing. These are loaded into Addison as soon as the item arrives and supplanted by full records when they become available. This means that a record will show up in Addison before the title reaches the shelves. National Transportation Safety Board. Many documents are at storage.