[Utilities-announce] PubMed EUtilities EFetch update

[utilities-announce at ncbi.nlm.nih.gov]

Dear PubMed EFetch Users,

The PubMed DTD was modified in 2017 to incorporate the attribute "IndexingMethod" for the element  <MedlineCitation>. Values will now be applied as appropriate for this attribute in citations indexed for MEDLINE to provide documentation of the method by which the set of Medical Subject Heading (MeSH) indexing terms was determined for a citation.

IndexingMethod values are for computational analysis of MEDLINE XML and are not searchable in PubMed.

Beginning in September 2018, these values will be added as appropriate for newly completed MEDLINE citations. For previously completed citations that were indexed by one of these methods, values will be added with the 2019 PubMed baseline file produced in December.

For additional details, please see the NLM Technical Bulletin article, Incorporating Values for Indexing Method in MEDLINE/PubMed XML.
https://www.nlm.nih.gov/pubs/techbull/ja18/ja18_indexing_method.html

Thank you.
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