|April 9, 2001 [posted]|
|New Indexing Information in Display of LocatorPlus Records|
LM is adding data to LocatorPlus records to support an expanded MEDLINE. MEDLINE is expanding to include unique journal citations from AIDSLINE, HISTLINE, SPACELINE, BIOETHICSLINE and POPLINE. NLM plans to add these citation subsets to MEDLINE later this year.
The selection of journals and articles indexed varies with each of these subsets of citations. Article selection was and is under the direction of the cooperating partner who creates and indexes the data. Citations in some subsets were selected from a list of core journals that were reviewed regularly. Others reflect article selection from the universe of published literature and were not limited to a specified list of source journals. It is possible that there may be only one, or very few, citations from some journals in the expanded MEDLINE.
The new Citation Subset values to be introduced in LocatorPlus records and expanded MEDLINE citations during 2001 are:
The additions to LocatorPlus must occur in advance of converting the citation data to PubMed. This is because there must be a record in LocatorPlus for the host journal of every citation in MEDLINE. Therefore, work is underway to create or update thousands of LocatorPlus records to indicate MEDLINE indexing for the citation subsets. As this work must be completed before any citations are added to MEDLINE, many journal records in LocatorPlus already contain indexing status information but do not yet have citations in PubMed.
This article provides instructions for locating MEDLINE citation sources in LocatorPlus and explanations of indexing status information in LocatorPlus records.
How to locate the source of a MEDLINE citation
How indexing status is indicated in LocatorPlus
Abstract/Indexing and Citation Subset information are displayed in the Details and MARC views of LocatorPlus records.
Remember: We are adding Abstract/Indexing data and Citation Subset values to LocatorPlus records in advance of converting the citation data to PubMed. Even if a journal's LocatorPlus record is tagged as MEDLINE, the citations for that journal title may not be in PubMed yet, especially if the 510 MEDLINE / Indexed in: note contains "Date range of indexed citations unspecified" and the 911 field contains one of the new subset values listed above. As of March 2001, only the HealthSTAR unique journal citations are in PubMed.
Internet Grateful Med access to the legacy ELHILL databases will be phased out as citations become available in PubMed. For more information see the January-February 2001 NLM Technical Bulletin at: www.nlm.nih.gov/pubs/techbull/jf01/jf01_igm_phaseout.html.
For information on journal citation subsets already searchable in PubMed, see the January-February 2001 NLM Technical Bulletin article at: http://www.nlm.nih.gov/pubs/techbull/jf01/jf01_pubmed_2001.html.
By Andrea Demsey and Jan Willis
Demsey A., Willis J. New Indexing Information in Display of LocatorPlus Records. NLM Tech Bull. 2001 Mar-Apr;(319):e6.