As mentioned [previously](http://blog.okfn.org/2007/07/18/we-need-an-open-service-definition/) on this blog recent developments, particularly the increase in ‘Software as a Service’ approaches, have created the need to think hard about what would constitute an `Free/Open Service’ (as opposed to just plain Free/Open Source software or Free/Open Knowledge).
Following extensive discussion in the last couple of months on the [okfn-discuss mailing list](http://lists.okfn.org/mailman/listinfo/okfn-discuss) (see [this thread in particular](http://lists.okfn.org/pipermail/okfn-discuss/2007-July/000475.html)) with contributions from, among others, Luis Villa, Mike Linksvayer, Saul Albert and Francis Irving, a first draft of an `[Open Service Definition][osd]’ has been put together and posted at:
The definition has intentionally been kept simple, and builds in a straightforward way on existing definitions of both the [open source](http://opensource.org/) and [open knowledge / data](http://opendefinition.org/):
> An open service is one:
> 1. Whose data is open as defined by the open knowledge definition (
> 2. Whose source code is:
> 1. Free/Open Source Software (that is available under a license in the OSI or FSF approved list — see note 3).
> 2. Made publicly available.
More details including clarificatory notes on the definition’s main page: