MEDLINE is the premier bibliographic database
of the National Library of Medicine (NLM) covering the fields of
medicine, nursing, dentistry, veterinary medicine, etc.
MEDLINE is the largest component of PubMed.
The MEDLINE database contains more than 19
citation records with some dating as far back as 1902.
The MEDLINE database contains citation records
and author abstracts, from over 5,600 biomedical
OLDMEDLINE comprises citation records
from two printed indexes: Cumulated Index Medicus and the Current
List of Medical Literature.
contains over 1.9 million citation records to articles from
biomedical journals, covering the fields of medicine, preclinical and
allied health sciences.
OLDMEDLINE contains citation records from
dating 1945 through 1965.
Over 75% of
citations in OLDMEDLINE are indexed with MeSH terms but, they do not
In Process, As
Supplied by Publisher, and Epub Ahead of Print
In Process citation records provide
citation information and abstracts in PubMed as they are NOT labeled with
MeSH terms for indexing in MEDLINE. They appear in PubMed with
the tag [PubMed - in process].
Citations received electronically from
publishers appear in PubMed with the tag [PubMed - as supplied by
Citation records for articles submitted by
that appear on the Web ahead-of-print display the tag [Epub ahead of
Keyword searching is necessary to retrieve
these records, as they are NOT labelled
with MeSH terms. Also, you can use special limiting tags to
for these record types.
Most of these progress to "in-process" status
and then to "indexed for MEDLINE" status when they receive their MeSH
term labels. At this stage one can use MeSH terms searches
to retrieve these citations.