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Announcements to NLM Data Licensees: Year 2014

(05/28/14) Schedule Change for MEDLINE/PubMed Update Files

(05/08/14) The National Library of Medicine, 1984-2014: Voyaging to the Future A Symposium

(03/28/14) MeSH 2014 Modifications

(02/19/14) Now Using md5sum Checksum File

(01/06/14) Catfile, CatfilePlus and Serfile MARC 2014 Baseline Files Now Available

(12/17/13) 2014 MEDLINE/PubMed Baseline Data; CatfilePlus and Serfile XML Baseline Files

2013 Announcements

Schedule Change for MEDLINE/PubMed Update Files

May 28, 2014

The National Library of Medicine is pleased to announce that beginning June 2, 2014, we will add new and updated citations to PubMed 7 days a week. Daily updating is a welcome enhancement to PubMed. Prior to this change, we updated PubMed 5 times a week on Tuesday through Saturday. Likewise, new MEDLINE/PubMed update files for NLM data licensees will appear on the ftp server daily by noon ET. More than one update file may become available on the same day. The update files are available all hours seven days per week throughout the year.

The National Library of Medicine, 1984-2014: Voyaging to the Future A Symposium

May 8, 2014

The National Library of Medicine wants to hear from you as we chart our future. To help us prepare for our next long range planning process, we are holding a symposium that will reflect on the last 30 years and consider opportunities for the future. The symposium, “The National Library of Medicine, 1984-2014: Voyaging to the Future" will be held May 14, 2014 from 8:30 a.m.-5 p.m. in the Natcher Conference Center (Building 45) on the National Institutes of Health campus in Bethesda, Maryland. We will videocast the event live and later archive it at If you’d like to attend the symposium, which is free, please register at We launched a symposium blog and invite you to share your thoughts about the library’s past and its future. Comments will be accepted throughout the year at

MeSH 2014 Modifications

March 28, 2014

Changes were made to the current 2014 MeSH Vocabulary. The MeSH Descriptors Bromelia, Freedom, Puma and Reward were modified to remove incorrect registry numbers. MEDLINE/PubMed records were updated to reflect these changes and re-exported to licensees on March 28, 2014. The updated MeSH Descriptor Records will be available from on Monday March 31, 2014. Licensees who downloaded the 2014 MeSH Descriptor Records should download them once again.

Now Using md5sum Checksum File

February 19, 2014

Each baseline and update data file has a corresponding checksum file that licensees may use as confirmation that the complete data file has been downloaded. Until now, we used md5 checksum files. Starting today, February 19, 2014, we are using md5sum checksum files. Licensees using md5 to generate checksum files to compare with the checksum file downloaded from the server should ignore the comments that accompany the md5 validation string.

Catfile, CatfilePlus and Serfile MARC 2014 Baseline Files Now Available

January 6, 2014

The updated 2014 MARC base files for Catfile, CatfilePlus, and Serfile are available on the NLM FTP server. These base files are each complete in a single file. Loading the base files on an annual basis is optional for MARC subscribers. If you have correctly loaded each of the update files, there is no need to reload the base files. The MARC file containing all the bibliographic records deleted by NLM between January 1, 2013 and December 31, 2013, will be available no later than February 1, 2014. Licensees who are new recipients of NLM MARC bibliographic records in 2014, as well as ongoing licensees who are discarding their pre-2014 records and reloading with the 2014 base files, do NOT need the delete file. The records in this file were removed from the NLM database prior to the pull of the 2014 base files. If loading new baseline files, you should then load the 2014 update files dated after the date of the base files.

2014 MEDLINE/PubMed Baseline Data; CatfilePlus and Serfile XML Baseline Files

December 17, 2013

    The 2014 MEDLINE/PubMed baseline files, which replace all previously distributed MEDLINE/PubMed data are now available for FTP. Licensees have been e-mailed the location of the FTP access instructions with additional information.

  2. 2014 UPDATE FILES
    The first group of 2014 update files and the special PMID list text file (see item 3 below) are also available. Please be sure to read the _notes.txt file that is on the server accompanying the first update file medline14n0747. Update files should be processed after the baseline files in ascending file name numeric sequence (see item 3 below for exception) to ensure that all new records are added and the most current and accurate version of each record is retained.

    A text file containing PMIDs of records in MedlineCitation Status = In-Process and MedlineCitation Status = In-Data-Review that have been retained in the 2014 version of PubMed at the time the 2014 baseline files were loaded and that are not exported to licensees in the first batch of update files is available. These records will eventually be exported in update files as completed records in MedlineCitation Status = MEDLINE or MedlineCitation Status = PubMed-not-MEDLINE or as deleted PMIDs in DeleteCitationSet. Licensees who wish to create a database as close as possible to the record content in PubMed on December 16, 2013 will want to include these records now.

    The file, named SpecialPubMedPMIDList_2014.txt, resides in the update file directory. Licensees may use the Entrez Utilities to download the records using the list of PMIDs.

    *IMPORTANT*: If you elect to add these records to your version of MEDLINE/PubMed, they must be added to your 2014 MEDLINE/PubMed database either 1) immediately after the baseline files and before any update files or, 2) immediately after update files medline14n0747 through medline14n0766 to ensure retaining the most current version of those records as subsequent update files are loaded. Do not add the records identified in SpecialPubMedPMIDList_2014.txt after you have processed medline14n0767 as this may result in retention of an earlier and inaccurate version of the records.

    The 2013 update files are moved to a new directory where they will remain for several weeks. Contact NLM at if you need access to those files.

    Documentation for the MEDLINE/PubMed baseline database is available from links in the Data Availability and Maintenance section of NLM’s information page for MEDLINE/PubMed licensees. Also see the MEDLINE/PubMed Maintenance Overview for information about and points to consider for processing update files. Announcements during the year will be added as they become available.

    The 2014 baseline data will be included at a later date in the MEDLINE/PubMed Baseline Repository (MBR) resources. If you wish to search the baseline data via the MBR Query Tool, be sure to use the same IP address registered with NLM for access to MEDLINE/PubMed from NLM’s FTP server.

CatfilePlus and Serfile XML Baseline Files

The updated XML base files for CatfilePlus and Serfile are available on the NLM FTP server. CatfilePlus is in 4 parts, named "catplusbase1of4.2014.xml", "catplusbase2of4.2014.xml", etc. The Serfile base file is complete in a single file, named "serfilebase.2014.xml". The baseline files contain all records through November 25, 2013 and should be used to completely replace all records previously distributed. The first XML update files for CatfilePlus and Serfile were made available November 25, 2013.