U.S. National Library of Medicine (NLM)
National Institutes of Health
Department of Health and Human Services

LICENSE AGREEMENT FOR NLM DATA

APPENDIX B:  REQUIREMENTS FOR USE OF NLM LICENSED DATA WITH UPDATES

Appendix B applies when Licensees’ products/services/applications are not based upon a static version of the data, but rather are updated on a regular or irregular basis by adding new records, replacing revised records, and removing deleted records supplied by NLM.  Appendix B applies whether or not the updated products/services/applications are available to a limited number of people or available to many people, and whether or not there is restricted or unrestricted use of the updated products/services/applications.

Each item below applies for use of licensed MEDLINE®/PubMed® data. Database name(s) in brackets following a clause indicates that the clause applies also for use of that data.

Licensee shall:

1.  Comply with the following data display requirements: 
A. If the product/service/application is a citation retrieval system displaying MEDLINE/PubMed citation data and the product/service/application does not provide a direct electronic link to the corresponding record in PubMed at NLM, at least the minimal set of data elements listed in Appendix C for each record must be displayed.  If the product/service/application is a citation retrieval system displaying MEDLINE/PubMed citation data and the product/service/application does provide a direct electronic link to the corresponding record in PubMed at NLM, there is no minimal set of data elements required for display.
           
B. If the product/service/application retrieves data derived from MEDLINE/PubMed records and does not provide a direct electronic link to the underlying record(s) in PubMed, at least the NLM PMID(s) associated with the underlying citation(s) from which the data are derived must be displayed (this enables users to obtain the record in PubMed).  If the product/service/application retrieves data derived from MEDLINE/PubMed records and does provide a direct electronic link to the underlying record(s) in PubMed, there is no data element requirement for display.

2.  Incorporate files that replace all previously distributed records (e.g., the annual MEDLINE/PubMed baseline files) no later than ninety (90) days after the date such files are made available to Licensee by NLM.  Licensee shall make known, in a suitably clear and conspicuous manner, the currency of the NLM data used in its products/services/applications, based on the date NLM released the most recent data file used (i.e., the date NLM put the files on its server).  [Also applies to Catfile, CatfilePlus, Serfile, CCRIS, ChemIDplus® Subset, HSDB®, GENE-TOX, TOXLINE® Subset]

3.  Follow the NLM best practices recommendation that Licensees incorporate periodic update files containing new and/or maintained records, and remove deleted records, at least once every thirty (30) days after the date made available to Licensee.  [Also applies to Catfile, CatfilePlus, and Serfile]

The following alternative to the best practices recommendation is permissible:   If, at Licensee’s discretion, the suitability of Licensee’s product/service/application is not adversely affected by less frequent updates, updates may take place less frequently than every thirty (30) days.  In this case, requirements in Appendix B still apply.  If Licensee’s products/services/applications are updated during a calendar year but not within thirty (30) days after NLM makes new/maintained/deleted records available, Licensee shall make known in a suitably clear and conspicuous manner that the products/services/applications may not reflect the most current/accurate biomedical/scientific data available from NLM.

In either case, Licensee shall make known, in a suitably clear and conspicuous manner, the currency of the NLM data used in its products/services/applications, based on the date NLM released the most recent data file used (i.e., the date NLM put the files on its server). 

4. Take reasonable steps to make known dosage errors in abstracts or retracted or partially retracted publications within thirty (30) days from the date such records are distributed by NLM. 
Recommended wording examples: 
“Published dosage error in abstract of PMID 1234567 is corrected in current version of the record.”
“Article cited in PMID 1234567 is retracted (or partially retracted) by item cited in PMID 9876543.”

5. Perform updates and any value-added activity in such a way that no NLM-provided content becomes incorrect.  [Also applies to Catfile, CatfilePlus, and Serfile, CCRIS, ChemIDplus Subset, HSDB, GENE-TOX, TOXLINE Subset]

6. Describe in a suitably clear and conspicuous manner the update frequency for Licensee’s addition of new records, application of maintained records, and removal of deleted records. [Also applies to Catfile, CatfilePlus, Serfile, CCRIS, ChemIDplus Subset, HSDB, GENE-TOX, TOXLINE Subset]

7. Take reasonable steps to prevent access to products/services/applications containing NLM data or data derived from NLM databases that have become superseded by updated and/or maintained versions.  [Also applies to CCRIS, ChemIDplus Subset, HSDB, GENE-TOX, TOXLINE Subset]