US Patent 7877366 Streaming XML data retrieval using XPath

An XML Extractor that extracts XML data from streamed input based on registered XPaths is provided. XPaths and associated content handlers instances are registered at runtime with the XML Extractor. The XML Extractor receives streaming input that represents XML data at a stream-based parser, and evaluates the received input against the registered XPaths expression. In response to detecting that the received streaming input includes an XPath that matches a registered XPath expression, the XML Extractor generates output to the content handler associated with the matching registered XPath expression.