|November 28, 2000 [posted]|
|MEDLINE Indexed Citations and Corrections Temporarily on Hold|
his is the time of the year when NLM's schedule for adding indexed citations to MEDLINE changes to accommodate NLM's internal maintenance cycle known as Year-End Processing (YEP). This year NLM is also engaged in the major task of replacing our system that manages the data entry, indexing, and quality control of journal citations. While both these tasks are in progress we have stopped adding fully indexed citations to our MEDLINE database.
In Process Citations
In early 2001, PubMed will be updated and the in process citations that are within the scope of MEDLINE will be replaced by indexed citations with MeSH terms, Publication Types, etc. Also, the citation bibliographic data will have been checked for accuracy.
This growing pool of unindexed citations is important to note for searchers who have chosen certain search terms from PubMed's Limits feature, e.g., Human, or who have qualified search terms for fields that are added to the citation during NLM's indexing process.
Please note that a search limiting terms to fields affected by indexing will never retrieve in process or publisher supplied records. However, during this period when we are not adding citations to MEDLINE, searchers, including those using the Cubby to store searches, may not understand why they may not be retrieving new records for many weeks. Searchers may want to consider not limiting their searches using impacted fields, e.g., [mh] or [pt] for this period.
If you are not tagging search terms (example: robotics review) or using limits in your search, this will not be a concern for you. Searches containing qualified search terms will retrieve all applicable MEDLINE records when run after PubMed has been updated in early 2001.
Corrections on Hold
2001 Version of MEDLINE
By Annette M. Nahin
Nahin AM, Knecht L. MEDLINE Indexed Citations and Corrections Temporarily on Hold. NLM Tech Bull. 2000 Nov-Dec;(317):e3.