.ep. i Medline (Electronic date of publication.)

For å avgrense til et tidsspenn...
Per januar 2010 har MEDLINE Ovid følgende avgrensingsmuligheter på tid:

DP
The Date of Publication (DP) field consists of the date of publication for a citation, in the format YYYY MMM DD (1950 dec 3). The Month and day are not always present. This field is also displayed as part of the Source (SO) field.
EP
The Electronic Date of Publication (EP) is the date the record was sent to NLM for inclusion in MEDLINE (R). This index appears in the format YYYYMMDD.
ED
The Entry Date (ED) field contains the issue (year, month and day) in which the document was indexed as a MEDLINE (R) record. This index appears in the format YYYYMMDD.
UP
The Update Date (UP) field contains the date the record was added to MEDLINE since the yearly reload completion. The Update Date for existing records changes with each global reload to reflect the date Ovid starts processing the reload data. The UP field appears in the format YYYYMMDD.
YR
The Year of Publication (YR) field contains the year in which an article or monograph was published. Only the four digit year is contained in the index.



Følgende er muligens utdatert/feil!
For å avgrense til et tidsspenn da referanser ble publisert i Medline, bruk .ep., ikke .ed.

The Electronic Date of Publication (EP) is the date the record was sent to NLM for inclusion in MEDLINE (R). This index appears in the format YYYYMMDD.

The Entry Date (ED) field contains the issue (year, month and day) in which the document was indexed as a MEDLINE (R) record. This index appears in the format YYYYMMDD.

Referanser publisert mellom 01 september 2005 og 01 mai 2008:
1. 200509$.ep.
2. 200510$.ep.
3. 200511$.ep.
4. 200512$.ep.
5. 2006$.ep.
6. 2007$.ep.
7. 200801$.ep.
8. 200802$.ep.
9. 200803$.ep.
9. 200804$.ep.
10. or/1-9