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In this paper, we propose an approach to retrieval XML data with structural context relaxation. We process user query and XML documents as structural term set. Context resemblance is computed based on level weight of element in context, level similarity between elements in longest matched subsequence and other factors. We extend Vector Space Model to answer XML content and structure search. Experiments...
With the rapid development of wireless network, online reading has become available in mobile reading devices. E-reader users can read and buy books through wireless network. Users can not only access to real-time comprehensive resource, but also access to book reviews, book recommendations etc. 3G communicating technology significantly improved data transfer speed which can meet network transmission...
The importance of XPath in XML filtering systems has led to a significant body of research on improving the processing performance of XPath queries. Most of the work, however, has been in the context of a single processing core. Given the prevalence of multicore processors, we believe that a parallel approach can provide significant benefits for a number of application scenarios. In this paper we...
Since emerged in 2004, Unified Threat Management (UTM) has been used widely to enhance network security protection. Typical UTM device integrates multiple security technologies, therefore its control and management involves various interfaces, message formats, communication protocols, and security policies and so on. Therefore, it is a big challenge to design and implement the configuration and management...
We investigate techniques to automatically decompose any XQuery query-including updating queries specified by the XQuery Update Facility (XQUF)-into subqueries, that can be executed near their data sources, i.e., function-shipping. The main challenge addressed here is to ensure that the decomposed queries properly respect XML node identity and preserve structural properties, when (parts of) XML nodes...
XML has seen wide acceptance in a number of application domains, and contributed to the success of wide-scale grid and scientific computing environments. Performance, however, is still an issue, and limits adoption under some situations where it might otherwise be able to provide significant interoperability, flexibility, and extensibility. As CPUs increasingly have multiple cores, parallel XML parsing...
Different models have been proposed recently for representing temporal data, tracking historical information, and recovering the state of the document as of any given time, in XML documents. We address the problem of labeling temporal XML documents. The goal of our labeling scheme is to design a structural labeling scheme that supports the representation of ancestor-descendant relationship and sibling...
We investigate techniques to automatically decompose any XQuery query into subqueries, that can be executed near their data sources; i.e., function-shipping. In this scenario, the subqueries being executed remotely may have XML node-valued parameters or results, that must be shipped in some way. The main challenge addressed here is to ensure that the decomposed queries properly respect XML node identity...
XML has been widely adopted across a wide spectrum of applications. Its parsing efficiency, however, remains a concern, and can be a bottleneck. At the same time, with the trend towards multicore CPUs, parallelization to improve performance has become increasingly relevant. In previous work, we have investigated parallelizing DOM-style parsing and gained significant speedup. For streaming XML applications,...
Though XML has gained significant acceptance in a number of application domains, XML parsing can still be a vexing performance bottleneck. With the growing prevalence of multicore CPUs, parallel XML parsing could be one option for addressing this bottleneck. Achieving data parallelism by dividing the XML document into chunks and then independently processing all chunks in parallel is difficult, however,...
By leveraging the growing prevalence of multicore CPUs, parallel XML parsing(PXP) can significantly improve the performance of XML, enhancing its suitability for scientific data which is often dominated by floating-point numbers. One approach is to divide the XML document into equal-sized chunks, and parse each chunk in parallel. XML parsing is inherently sequential, however, because the state of...
Performance of XML parsers with validation are usually suffer. This is because such parsers need first parsing and undertanding XML schemas, and thus are limited by the very complexity of XML schemas. Schema-specific approach, however, may adjust such problem. In this paper, we introduce a high performance SAX like validating XML parser using a schema-specific approach. In this approach, a schema...
A number of techniques to improve the parsing performance of XML have been developed. Generally, however, these techniques have limited impact on the construction of a DOM tree, which can be a significant bottleneck. Meanwhile, the trend in hardware technology is toward an increasing number of cores per CPU. As we have shown in previous work, these cores can be used to parse XML in parallel, resulting...
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