In the final sca composite file for the application, notice that the addition of JScript and Groovy components is a Tuscany-specific extension to the sca specification.
This method is often referred to simply as XPointer, which is actually the name of an extension of a specification on how to identify information in an XML file, known as the XPath specification.
这种方法通常简称为 XPointer，实际上，它是 XPath 规范 的一个扩展的名称，这个规范关于如何标识 XML 文件中的信息。