XML Compression. Aslam Tajwala Kalyan Chakravorty. Overview. Motivation for XML Compression Techniques for achieving XML compression XMill XMill Architecture. Why Compress XML?. Structured nature of XML makes it understandable to humans, Downside: XML is verbose
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<Employee id=“1”>Homer Simpson</Employee>
<Employee id=“2”>Frank Grimes</Employee>
T1 T2 T3 C3 / C4 / T2 T3 C3 / C4 / /
T2 => Employee
T3 => @id
xmill –p //(Name | Location) employees.xml
xmill –p //price=>i file.xml
Applies integer compressor to each occurrence of ‘price’ element in file.xml
When the window is filled, all containers are gzipped, stored on disk, and the compression resumes.