An Empirical Study of Schema Independent Homomorphic Queriable XML Compression Techniques

Abstract

With the rise of computer or digital world, data transfer also increase drastically. XML document standard became the de-facto standard for data transfer since from its inception. To minimize the amount of data volume many compressors came into existence. XML Compressors are proposed to minimize the data size of the XML file. The verbose and repetitive nature of XML is the major cause of large file size. But the structure of XML file is very simple because of this, XML become so popular in data representation and data transfer despite of its large size than any other data representation. Homomorphic XML compressor hence save the structure of XML structure. This study compares three schema-independent homomorphic queriable compressors: XGRIND, XPRESS and XQPoint. The behavior of these three XML compressors are compared using four set of XML data. The study shows the performance of the evaluated XML compressors with change in properties of XML document like change in node count, element count and depth. Also, the memory consumption during compression and decompression is evaluated. Finally, better XML compressor is proposed among the evaluated compressors.