Maintenance method for package device
A wrapper and data item technology, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve the problem of low accuracy and achieve the effect of high accuracy
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[0037] In order to understand the present invention more easily, related concepts are now described.
[0038] A wrapper is capable of wrapping data from a semi-structured or unstructured data source into structured or semi-structured data with a schema. For the Web wrapper, the data in the semi-structured modeless HTML page is extracted to obtain the semi-structured XML data with mode.
[0039] Schema specifies the elements that can exist in a document, the attributes that elements can have, the data types, the hierarchy of elements within elements, and the order in which elements appear in the entire document. It enables the documentation of tags, enforces internal consistency of tag parameters, and enables XML parsers to validate documentation. In the present invention, DTD is used to describe the data in the webpage to be extracted by the user and the format of the resulting XML document finally obtained from the wrapper.
[0040] HTML tree: The HTML document can be parse...
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