* Quality factors in the [[#Content Negotiation|Accept header]] will be evaluated
* <code>%input</code> annotations, support for input-specific content-type parameters
* Since {{Version|8.4}}: <code>%rest:single</code> annotation to cancel running RESTXQ functions
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==Query Execution==
{{Mark|Introduced with Version 8.4}}: <code>%rest:single</code> annotation.
In many RESTXQ search scenarios, input from browser forms is processed and search results are returned. User experience can generally be made more interactive if an updated search request is triggered with each key click. However, this may lead to many expensive parallel requests, from which only the result of the last request will be relevant for the client.