Hierarchical conditional random fields for web extraction


Ontology type: sgo:Patent     


Patent Info

DATE

2010-05-18T00:00

AUTHORS

Ji-Rong Wen , Wei-Ying Ma , Zaiqing Nie , Jun Zhu

ABSTRACT

A method and system for labeling object information of an information page is provided. A labeling system identifies an object record of an information page based on the labeling of object elements within an object record and labels object elements based on the identification of an object record that contains the object elements. To identify the records and label the elements, the labeling system generates a hierarchical representation of blocks of an information page. The labeling system identifies records and elements within the records by propagating probability-related information of record labels and element labels through the hierarchy of the blocks. The labeling system generates a feature vector for each block to represent the block and calculates a probability of a label for a block being correct based on a score derived from the feature vectors associated with related blocks. The labeling system searches for the labeling of records and elements that has the highest probability of being correct. More... »

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