https://www.nlm.nih.gov/tsd/cataloging/unstringmesh.html After consulting with NLM, who has been very open with us about their processes and plans, we have been given permission to direct you to the site listed above. Please note that this site has been put up very recently, so chances are NLM will update it with points of clarification and changes. For example, the version I'm looking at lists Folklore as a deconstructed geographic subject heading (651) rather than as an expected topical subject heading (650). NLM is planning to deconstruct their MeSH subject headings and redistribute their authorities on January 6, 2016. According to the information in the link above, the logic behind how they plan to do this is actually more straightforward than we initially thought. Suffice to say, we at Backstage feel confident that we can implement NLM's deconstruction processes on our side in order to transform your records with MeSH headings. There would be some work involved on our side, though. So we would anticipate charging $0.01 per record processed for this service. Please note that this charge only applies if you do a retrospective transformation of your affected bib records with MeSH headings. Our plan is to wipe out each client's current MeSH authority file, regardless of whether you plan to have Backstage handle the actual deconstruction of your existing set of MeSH records. For our ongoing clients whose profile asks us to match their MeSH headings against the NLM authority file, we will automatically apply the deconstruction service to their affected records. There will be no extra cost to do this for the ongoing records we process. Even if you hold off (indefinitely) on doing the retrospective deconstruction, we will still apply the deconstruction to your ongoing records. Of course, if you would prefer we hold off even on that, please let your project manager know: either Stephanie Hansen<mailto:stephanie@bslw.com?subject=MeSH%20Deconstruction%20-%20Hold%20on%20Ongoing%20Records> or Lee Ann Lavender<mailto:leeann@bslw.com?subject=MeSH%20Deconstruction%20-%20Hold%20on%20Ongoing%20Records>. This is our proposal for handling NLM's planned deconstruction of its MeSH authorities: 1. Wipe out MeSH authority file from all existing clients. 2. Apply deconstruction service to ongoing clients who have selected to match against MeSH in their online profile (link<http://ac.bslw.com/community/wiki/index.php/Step_3.8>). 3. If you elect to do the retrospective deconstruction: a. Send us all bib records with MeSH headings; or, send us all records and we can separate these out for you. b. Backstage applies deconstruction service to your affected MeSH records. c. Deliver to you: updated bibs and new matching NLM authorities. d. You would then need to overlay those bibs and replace your existing MeSH authority file with what we deliver back to you. We anticipate we can have a solution, as described above, in place by December 14. Please let us know any questions or concerns you may have about this information. Thanks, Nate Nate Cothran | Vice President, Automation Services Backstage Library Works | Provo, Utah & Bethlehem, Pennsylvania 801.342.5697 | nate@bslw.com<mailto:nate@bslw.com?subject=Automated%20Services> | ac.bslw.com/mars<http://ac.bslw.com/mars> | How am I doing?<http://ac.bslw.com/customer_satisfaction/review.php?token=15>