In practice all JAXP processors support the three standard kinds of Source (DOMSource, SAXSource, StreamSource) and the three standard kinds of Result (DOMResult, SAXResult, StreamResult) and possibly other implementations of their own.
实际上所有JAXP处理器支持三种标准类型的Source （DOMSource，SAXSource，StreamSource）以及三种标准类型的Result （DOMResult，SAXResult，StreamResult）以及处理器自己的实现。