A.Retrieval of structuring of data contents
The structuring of data contents is to extract the contents of semi-structured data on Web into structured data according to certain demands.
It is a kind of vertical retrieval mode of data. For example, commodity information in webpage text is retrieved to extract commodity name, price, brief introduction...and it is even available to further subdivide the brief introduction to laptop into "brand, model, CPU, memory, hard disk, display screen..."; the following shall be extracted from the retrieval of
real estate information: Model, territory, layout of house, area, decoration conditions, rent, contact person, telephone; the following shall be extracted from the retrieval of corporate enterprise information: Company name, address, telephone, contact person.
Obviously, the relational data model can be used to carry out structuring of these data, and the mode of structural
template can be adopted.