A Call to Action in OASIS is an open letter from a whole range of Open Source big names against the latest OASIS framework conditions. OASIS deals with the standardization of data formats and web services, and in the latest framework conditions, standards should also allow those based on patented techniques - and thus ultimately give companies the means to exclude Open Source programs with these standards. In principle, a rehash of the same stupid idea from the W3C - which then withdrew this idea in response to the protests.