Problem some might have noted is that some search engines e.g. OVID list
citations by date of entry, not date of publication. Consequently all those
citations that have been retagged as part of the NIH project are now being
listed out of order which can be quite annoying.
Andrew Jull
Clinical Nurse Consultant
Auckland Hospital
NEW ZEALAND
> -----Original Message-----
> From: padmanabhan badrinath [SMTP:[log in to unmask]]
> Sent: Tuesday, 12 June 2001 18:15
> To: [log in to unmask]
> Subject: Entrez, publication & Mesh dates - some info
>
> Dear Sanguansak,
>
> Greetings from Al-Ain the oasis city of the Middle East. Regarding your
> above posting you might find the following useful. I am just posting the
> facts and not doing any interpretations!
>
> http://www.ncbi.nlm.nih.gov/entrez/query/static/help/pmhelp.html
>
> These definitions below are taken from the link "search field descriptions
> and tags" from the above URL (they are listed alphabetically).
>
> Entrez date:
>
> Entrez Date [EDAT] Date the citation was added to the PubMed database.
> The
> Entrez Date is set to the Publication Date on citations before September
> 1997 when this field was first added to PubMed. Citations are displayed
> in
> Entrez Date order which is last in, first out. Dates or date ranges must
> be
> entered using the format YYYY/MM/DD [edat], e.g. 1998/04/06 [edat] . The
> month and day are optional (e.g., 1998 [edat] or 1998/03 [edat]). To enter
> a
> date range, insert a colon (:) between each date (e.g., 1996:1997 [edat]
> or
> 1998/01:1998/04 [edat]).
> Note:
> The Entrez Date will remain unchanged and is not updated to reflect the
> date
> a Publisher Supplied record is elevated to in process or when an in
> process
> record is elevated to MEDLINE. Therefore, use caution when your strategy
> includes only MeSH terms and a date or date range using the search field
> tag, [edat], because the addition of MeSH terms to a record will not
> change
> the Entrez Date [edat].
>
> MsSH Date:
>
> MeSH Date [MHDA] The date the citation was indexed with MeSH Terms and
> elevated to MEDLINE for citations with an Entrez Date after March 4, 2000.
> The MeSH Date is initially set to the Entrez Date when the citation is
> added
> to PubMed. If the MeSH Date and Entrez Date on a citation are the same,
> and
> the Entrez Date is after March 4, 2000, the citation has not yet been
> indexed. Dates or date ranges must be entered using the format YYYY/MM/DD
> [mhda], e.g. 2000/03/15 [mhda] . The month and day are optional (e.g.,
> 2000
> [mhda] or 2000/03 [mhda]). To enter a date range, insert a colon (:)
> between
> each date (e.g., 1999:2000 [mhda] or 2000/03:2000/04 [mhda]).
>
> Publication date:
>
> Publication Date [DP] The date that the article was published. Dates or
> date
> ranges must be searched using the format YYYY/MM/DD [dp], e.g. 1998/03/06
> [dp] . The month and day are optional (e.g., 1998 [dp] or 1998/03 [dp]).
> To
> enter a date range, insert a colon (:) between each date (e.g., 1996:1998
> [dp] or 1998/01:1998/04 [dp]).
> Note:
> Journals vary in the way the publication date appears on an issue. Some
> journals include just the year, whereas others include the year plus month
> or year plus month plus day. And, some journals use the year and season
> (e.g.,Winter 1997). The publication date in the citation is recorded as it
> appears in the journal. It is recommended that you search only by year
> (e.g., 1996 [dp] or 1995:1997 [dp])
>
> Hope some one from the NLM will explaing these in non technical words.
>
> Hope this is of some help.
>
> Cheers & regards,
>
> Badri
>
> Dr.P.Badrinath M.D.,M.Phil.,(Epid) PhD(Cantab)
> Clinical Assistant Professor and Epidemiologist,
> Department of Community Medicine,
> UAE University, PO Box 17666, Al Ain,
> United Arab Emirates.
> Tel: 00 971 3 7039 652
> Fax: 00 971 3 7672022.
> http://myprofile.cos.com/badrishanthi
>
> "For an excellent review of the current medical literature, go to Journals
> Scan www.uaeu.ac.ae/jscan/index.htm" - BMJ 3rd June 2000,Reviews(Netlines)
>
> _________________________________________________________________
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