How to trigger a log entry

[zoltan]

I've created a new log file to use for showing if/when selected filters are used. The entries should list: filter name, date/time, and the url that triggered the filter. So far, not much success. Reading the 5 sentences the Matching Commands section devotes to $ADDLST gets me to $ADDLST(ListName,filtername), but doesn't help with the rest.

Looking at existing filters, it seems that putting $ADDLST(New-Log,filtername,[$DTM(d T)]) in the URL Match box might work but that seems to generate a line whether the filter is used or not.

Also, is there a way to use the log to count the number of times a filter is used rather than list it each time?