The date on which the work which is cited was examined
Some online resources are changing so quickly that a citation to the resource is not complete without the date on which the cited resource was examined, since a day before or a day later, the relevant material might be different.
<!ELEMENT access-date (#PCDATA %access-date-elements;)* >
Any combination of:
<article> <front>... </front> <body>... </body> <back> <ref-list> ... <ref> <citation citation-type="web"> <source>Hypertension, Dialysis & Clinical Nephrology [Internet]</source> <year>c1995-2001</year> <access-date>cited 2001 Mar 8</access-date> <publisher-loc>Hinsdale (IL)</publisher-loc> <publisher-name>Medtext, Inc.</publisher-name> Available from: <ext-link ext-link-type="url" xlink:href="www.medtext.com/hdcn.htm"> http://www.medtext.com/hdcn.htm</ext-link> </citation> </ref> </ref-list> </back> </article>