Dirk Westfal:
i`m looking for a way to implement an "aging" mechanism for documents/articles to indicate the assumed reliability of the content as part of a
quality
management process:
One way would be to put a template on the page itself, which indicates the status in some non-intrusive way. You can then use REVISIONDAY, etc.
For example, this template:
Last mod on {{REVISIONDAY}}/{{REVISIONMONTH}}/{{REVISIONYEAR}}:{{REVISIONTIMESTAMP}} Now is {{CURRENTTIMESTAMP}}
produces
Last mod on 10/4/2007:20070410075005 Now is 20070410145234
Use the parser functions to do some math on CURRENTTIMESTAMP versus REVISIONTIMESTAMP, and produce the appropriate output.
Note that CURRENTTIMESTAMP only updates when the page cache expires, so (depending on the magic $wgCacheEpoch stuff at the end of LocalSettings.php) it may be a day or two out of date, but it should suffice for your purposes.
Ian