Mining for regular expressions from text

Hi all
I have a situation where I need to develop a set of regular expressions from lists.
I have lists of files uploaded and downloaded, and when the event happened. I need to analyze these and boil them down to a set of regular expressions.
The regular expressions will be used in the future to check the logs for activities. For example:
foo*.zip is downloaded every night. Has it been downloaded tonight.
I am looking for help in analyzing the lists of files and deriving regular expressions to describe them.
Any ideas?
Thanks all

check the url http://java.sun.com/developer/technicalArticles/releases/1.4regex/index.html

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Mining for regular expressions from text

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