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Larsson and Moffat's RePair algorithm is generalized from strings to trees. The new algorithm (TreeRePair) produces straight-line linear context-free tree (SLT) grammars which are smaller than those produced by previous grammar-based compressors such as BPLEX. Experiments show that a Huffman-based coding of the resulting grammars gives compression ratios comparable to the best known XML file compressors...
SOAP Web services create high network traffic because of its generated large XML messages resulting in poor network performance. Therefore, enhancing the performance of Web services by compressing SOAP messages is considered to be an important issue. Compression ratios achieved by most of the existing techniques and tools are not high enough, and even a tiny improvement could save tremendous amount...
Most organizations exchange, collect, store and process data over the Internet. Many hospital networks deploy Web services to send and receive patient information. SOAP (Simple Object Access Protocol) is the most usable communication protocol for Web services. XML is the standard encoding language of SOAP messages. However, the major drawback of XML messages is the high network traffic caused by large...
As XML has become the standard of data exchange and express of Internet and e-commerce, it is being more and more widely used, while XML is a kind of self-described language, with a large number of redundant structural information, so that is the hot study now on how to use XML data stream to be reasonable and efficient. The existing compression techniques of XML require two-pass scan on data, which...
In an XML document a considerable fraction consists of markup, that is, begin and end-element tags describing the document's tree structure. XML compression tools such as XMill separate the tree structure from the data content and compress each separately. The main focus in these compression tools is how to group similar data content together prior to performing standard data compression such as gzip,...
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