System and method for an improved type inference

Details System and method for an improved type inference System and method for an improved type inference

2005-04-25

2008-09-16

Starks, Jr., Wilbert L (Department: 2129)

Data processing: artificial intelligence

Knowledge processing system

Knowledge representation and reasoning technique

C706S045000

Reexamination Certificate

active

07426503

ABSTRACT:
An improved type inference may be calculated for a path expression that may be classified into a series of input expressions followed by steps. For each such series, the inference may be calculated based on input including a type for the input expression, an axis for the step, and a node test for the step. The cardinality of the input expression type is preserved for the calculation of the step type. Also, a set of one or more matching node types may be identified within the type repository. These matching node types are node types within the axis of the step that match the node test of the step. These matching node types are identified without calculating the full content type implied by the axis. Avoiding the calculation of the full content type of the axis may reduce the processing time required to perform the inference.

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Draper, D., et al. (Eds.) “XQuery 1.0 and XPath 2.0 Formal Semantics,” http://www.w3.org/TR/xquery-semantics, downloaded from the internet on Apr. 20, 2006, pp. 1-266.

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