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Annotation Callback Function

An annotation server must register (with ANNO_registerReceiveFn) a callback function to be called when an annotation request is ready. The callback function must conform to the following prototype: 
ANNO_receiveFn(	const ANNNO_ConnectionID cid,
		const ANNO_requestId requestId,
		const EV_AttrValue *annoRequest);
where:

  • cid indicates the connection on which the request was received
  • requestId gives a unique id for requests from the engine on that connection
  • annoRequest points to the list of values sent by the annotate node

The annotation server must respond to every annotation request it receives, in order for the engine to release resources allocated to the request.