The Application and Analysis of Netconf Subtree Filtering Based on SAX and DOM

NETCONF, a new network management protocol, was released in 2006 which has overcome the weaknesses of SNMP. In the NETCONF protocol, it proposed a new mechanism subtree filtering, which allows an application to select particular XML subtrees. With the Subtree Filtering, specifically information of XML can be filtered out as a XML subtree. However, since the Subtree Filtering depends on the parsing and querying of XML, the XML parser which applies in the Subtree Filtering does a great effect to the performance of Filtering. Furthermore, DOM parser and SAX parser become two main API for us to parse and get the information from the XML. This paper tries to consider DOM and SAX parser in the application of subtree filtering, and evaluate them through the performance they represent in the process of subtree filtering. We find that SAX is not as convenient as DOM to apply to the subtree filtering, but has batter performance.