3 results about "Xpath expression" patented technology

The present invention discloses a universal data container, in the form of a generic tabular representation, and methods of navigating and transforming said generic tabular representation by invoking standard SQL-Expressions, implementing the equivalent of XPath expressions, obviating the need for SQL extensions or format-specific query languages, the container accommodating disparate sources regardless of type or format, placing structured and unstructured sources on an equal footing.

The invention discloses a webpage element similarity detection method based on adaptive clustering, which comprises the following steps: S1, input field XPath processing: receiving an XPath path of at least one target field as input, and verifying the format validity of the XPath path; s2, element path extraction: positioning a corresponding webpage HTML (Hypertext Markup Language) element according to a verified XPath path, and extracting a complete label path of the HTML element from a node of the HTML element to a webpage root node; s3, calculating the similarity; s4, distribution analysis: constructing a symmetric similarity matrix for the comprehensive similarity of all the element pairs obtained in the step S3, and performing statistical distribution analysis on comprehensive similarity values in the similarity matrix by adopting kernel density estimation; s5, self-adaptive clustering: performing multi-target clustering on the HTML elements based on the distribution peak value and the salient interval identified in the step S4; s6, generating an XPath (X Path); and S7, outputting: outputting the optimized general XPath expression. The method has the advantages of high adaptability, high accuracy, good robustness, high efficiency, high universality and the like.

The application discloses a webpage element similarity detection method based on adaptive clustering, comprising the following steps: S1. Input field XPath processing: receiving the XPath path of at least one target field as input, and verifying the format validity of the XPath path; S2. Element path extraction: locating the corresponding webpage HTML element according to the verified XPath path, and extracting the complete tag path of the HTML element from the own node to the webpage root node; S3. Similarity calculation; S4. Distribution analysis: constructing a symmetric similarity matrix of the comprehensive similarity of all element pairs obtained in step S3, and performing statistical distribution analysis on the comprehensive similarity value in the similarity matrix by using kernel density estimation; S5. Adaptive clustering: performing multi-target clustering on the HTML element based on the distribution peak value and significant interval identified in step S4; S6. XPath generation; S7. Output: outputting the optimized general XPath expression. The application has the advantages of strong adaptability, high accuracy, good robustness, high efficiency and strong universality.