
For years, Microsoft has insisted that open-source vendors acknowledge that its patent portfolio is a precursor to interoperability discussions. Monday, Microsoft shed that charade and
announced an interoperability alliance with Red Hat for virtualization. Red Hat has long argued that patent discussions only
cloud true interoperability, which is best managed through open source and open standards. Now it has got
what it wanted; unlike the Novell-Microsoft agreements, there is no exclusionary patent deals or cross payments.