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Hi, A traditional major.minor.patch sounds good to me. I do not particularly like the linking recommendations that APR has, which are: libNAME-MAJOR.so.0.MINOR.PATCH I would like to avoid tying a particular compilation style with the versioning scheme. I would propose: 1) MAJOR is incremented for non-backward-compatible wire compatibility, source compatibility, or binary compatibility changes 2) MINOR is incremented for backward-compatible wire, source, or binary compatibility changes. MINOR changes may not be forward compatible. 3) PATCH is incremented when there are no wire, source, or binary compatibility changes. So, - It is safe to upgrade or downgrade within the same MAJOR.MINOR release. - It is safe to upgrade within the same MAJOR release. - No guarantees are made between MAJOR releases. I like version numbers that are informative to the sysadmins like this. I also think the version numbers should be separate to the release policy and the support policy. Brian On Sep 17, 2010, at 2:05 AM, Peter Elmer wrote: > Hi, > > On Sep 17, 2010, at 8:41, Dirk Duellmann <[log in to unmask]> wrote: >> since the last call I had a look at several existing project policies and it seems to me that >> classical major.minor.patch structure should work well and most users will >> have a reasonable expectation what a version change means. For a more formal definition >> of the change semantics in each number we could maybe adapt eg the simple approach >> described on >> http://apr.apache.org/versioning.html > > This also seems reasonable to me. (I think the date-time scheme was my > fault^H^H^H^H^Hidea, and was only really meant for the very early period, > now years ago, in xrootd development when only a few places deployed it > and usually were very close to the latest version. A more standard scheme is long > since due!) > > Pete > > ------------------------------------------------------------------------- > Peter Elmer E-mail: [log in to unmask] Phone: +41 (22) 767-4644 > Address: CERN Division PPE, Bat. 32 2C-14, CH-1211 Geneva 23, Switzerland > ------------------------------------------------------------------------- >>