Using semantics for XPath query transformation
International Journal of Web and Grid Services
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We propose ELF (Constraint-aware XQuery Engine for processing XML Streams with Minimized Memory Footprint) in this demonstration. Given the DTD of the input stream, ELF on the fly detects the Pattern Non-Occurrence (PNO) constraints and then utilize such runtime constraint knowledge to adjust the buffering strategy dynamically, thus effectively decreasing the memory consumption.