"Red Hat's patent policy says 'In an attempt to protect and promote the open source community, Red Hat has elected to… develop a corresponding portfolio of software patents for defensive purposes. We do so reluctantly…' Meanwhile, USPTO Application #: 20090063418, 'Method and an apparatus to deliver messages between applications,' claims a patent on routing messages using an XQuery match, which is an extension of the 'unencumbered' AMQP protocol that Red Hat is helping to make. Is this a defensive patent, or is Red Hat cynically staking out a software patent claim to an obvious extension of AMQP? Is Red Hat's promise to 'refrain from enforcing the infringed patent' against open source a reliable contract, or a trap for the unwary? Given the Microsoft-Red Hat deal in February, are we seeing Red Hat's 'Novell Moment?"