SubscriptionHeaders element in jms binding

[Rashmi Hunt]

Question on SubscriptionHeaders element in jms binding.

Is 'SubscriptionHeaders' element, Tuscany's extension to JMS binding spec
XSD?  I am not seeing it in JMS binding spec.

<binding.jms uri="jms:ServiceTopic" >
    <SubscriptionHeaders JMSSelector="JMSType = 'type1'"/>
</binding.jms>

Thanks
Rashmi