Abstract
Grammar-based compressors like e.g. CluX [1], BPLEX [2], TreeRePAIR [3] transform an XML tree X into a context-free straight-line linear tree (CSLT) grammar G and yield strong compression ratios compared to other classes of XML-specific compressors. However, CSLT grammars have the disadvantage that simulating on G update operations like inserting, deleting, or re-labeling a node V of X requires to isolate the path from X’s root to V from all the paths represented by G. Usually, this leads to an increased redundancy within G, as grammar rules are copied and modified, but the original and the modified grammar rules often differ only slightly. In this paper, we propose extended context-free straight-line tree (ECST) grammars that allow reducing the redundancy created by path isolation. Furthermore, we show how to query and how to update ECST compressed grammars.
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Böttcher, S., Hartel, R., Jacobs, T., Jeromin, M. (2015). ECST – Extended Context-Free Straight-Line Tree Grammars. In: Maneth, S. (eds) Data Science. BICOD 2015. Lecture Notes in Computer Science(), vol 9147. Springer, Cham. https://doi.org/10.1007/978-3-319-20424-6_18
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DOI: https://doi.org/10.1007/978-3-319-20424-6_18
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