Pre-Grant Publication Number: 20090125495
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Prior Art (4)
Title XAOS: An Algorithm for Streaming XPath Processing with Forward and Backward Axes
Description
XAOS (pronounced "chaos") is an algorithm for streaming XPath processing which allows expressions
that use both forward and backward axes.
Title Ef*cient Evaluation of XQuery over Streaming Data
Description
Abstract
With the growing popularity of XML and emergence
of streaming data model, processing queries
over streaming XML has become an important
topic. This paper presents a new framework and
a set of techniques for processing XQuery over
streaming data.
Title Compiling XPath for streaming access policy
Description
"We show how the full XPath language can be compiled into a minimal subset suited for stream-based evaluation. Specifically, we show how XPath normalization into a core language as proposed in the current W3C ``Last Call'' draft of the XPath/XQuery Formal Semantics can be extended such that both the context state and reverse axes can be eliminated from the core XPath (and potentially XQuery) language. This allows execution of (almost) full XPath on any of the emerging streaming subsets."
Patent/Application # 20070174242
Description
"A query is received, wherein the query is formed by one or more paths, and wherein each path includes one or more steps...traversing the hierarchical document, one or more extraction entries are constructed, wherein each extraction entry includes a step instance match candidate identifying a document node and a step instance ancestor path for the document node, and one or more tuples are constructed using the one or more extraction entries ....
