Dear Ovid MEDLINE Customer:
On 29 September, the NLM supplied us with an unexpected and unusually large set of replacements, containing 1.62 million records. These replacements are a mix of corrections to fully indexed status MEDLINE records (200,000), and replacements for MEDLINE In-Process/Non-Indexed records (1.4 million).
As we start to implement this huge update over the next weeks, we want to inform you, as it may affect some saved searches, and AutoAlert result counts for Ovid MEDLINE.
We expect the volume of In-Process records (database segment prem) to increase by a factor of 5 daily over the next weeks, and on 14 October we expect to load a large set of corrections (database segment medc).
Why did the NLM create such a large update?
Upon our request the PubMed Helpdesk provided the following explanation to Ovid: we apologize for the unusually high number of modified citations in PubMed. NLM Serials staff updated the ISO abbreviation for a number of journals and that process also modified the PubMed citations.
What exactly changed?
For all 1.62 million records, the “ISO Journal Abbreviation” (IO) field was updated to reflect the new Journal Abbreviation.
ISO Journal Abbreviations in PubMed/MEDLINE follow the international ISO 4 standard, a uniform system for the abbreviation of serial publication titles. Where needed, the NLM also changed the PubMed TA Title Abbreviation field. On Ovid this is called the Journal Abbreviation field (JA).
What does this mean for Ovid MEDLINE users?
We expect the impact for most Ovid users to be minimal, but we do recognize the following situations:
Feel free to contact Customer Support with any questions by sending an email to [email protected].
Wolters Kluwer – Ovid