The Rockefeller Archive Center just wrapped up a little less than five month long project to separate our archival and bibliographic data, both in our collections management system and our discovery interface. You might have read a little bit about this in Katie Martin’s blog post describing the process of removing our library data from ArchivesSpace, but that only covers a portion of the entire project. The processing group working on the export scripts in mid-May, finished in mid-June, and we gathered requirements, built, tested, and launched the system from mid-June to the first week of October. Now that our new library discovery system has gone live, this post will provide more context to the project, outline the process, discuss the technical profile of the system, and finally share some lessons we learned along the way.