From XPath to SPL
The multi-layer structure of XML is difficult to calculate, and the computing power of XPath is seriously insufficient. It can only play a role in the early Internet applications with weak computing needs. Today’s computing needs are increasingly complex and changeable, and SPL, a more powerful XML computing language, is needed. XML can express data flexibly and has the characteristics of cross platform. It is widely used in web exchange services and data services, such as WebService. However, the multi-layer XML structure is complex and inconvenient to calculate. In this case, XML computing language needs to be used. In the
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