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At my work we have a logging library that has concepts of log topics and log levels. These are orthogonal - any particular log message is associated with one topic and has one level, but the messages for a given topic can have any level specified. The topics are arranged in a tree-like hierarchy, and if a minimum logging level is specified for a topic it also affects any subtopics of that topic which have not had a logging level specifically set.

I would assume what you call "topic" here, is what I've done by using loggers/hierarchy. Have you read the docs?

John, what we call topics are indeed analogous to your loggers. I have indeed read the docs and found a lot to like in the proposed library, but it does need the ability to specify different levels for different messages on a particular log (IMHO, of course :) ) Spencer ------------------------------------------------------------------------ For more information about Barclays Capital, please visit our web site at http://www.barcap.com. Internet communications are not secure and therefore the Barclays Group does not accept legal responsibility for the contents of this message. Although the Barclays Group operates anti-virus programmes, it does not accept responsibility for any damage whatsoever that is caused by viruses being passed. Any views or opinions presented are solely those of the author and do not necessarily represent those of the Barclays Group. Replies to this email may be monitored by the Barclays Group for operational or business reasons. ------------------------------------------------------------------------