Streaming XML means dynamic data

Dynamic data

Dynamic data or transactional data denotes information that is asynchronously changed as further updates to the information become available....

 which is in an XML

XML

Extensible Markup Language is a set of rules for encoding documents in machine-readable form. It is defined in the XML 1.0 Specification produced by the W3C, and several other related specifications, all gratis open standards....

 format.

Another popular use of this term refers to one method of consuming XML data – largely known as Simple API for XML

Simple API for XML

SAX is an event-based sequential access parser API developed by the XML-DEV mailing list for XML documents. SAX provides a mechanism for reading data from an XML document that is an alternative to that provided by the Document Object Model...

. This is via asynchronous events that are generated as the XML data is parsed. In this context, the consumer streams through the XML data one item at a time. It does not have anything to do whether the underlying data is being updated via dynamic or static means.

Uses

• Extensible Messaging and Presence Protocol
  Extensible Messaging and Presence Protocol
  Extensible Messaging and Presence Protocol is an open-standard communications protocol for message-oriented middleware based on XML . The protocol was originally named Jabber, and was developed by the Jabber open-source community in 1999 for near-real-time, extensible instant messaging , presence...
  
   (XMPP). This is the protocol used for example in Google Talk
  Google Talk
  Google Talk is a freeware voice over Internet protocol client application offered by Google Inc. The first beta version of the program was released on August 24, 2005...
  
  .