The paper began from studying the process that metadata was departed from underlying data,then the classification and definition of metadata were studied, at last we came up with the metadata in general sense and the metadata in narrow sense, .

Local chronicle documentation as the broad sense data source exhibits its unique advantage of rich resources, advantage of covering modern and historic times, and the information-relative advantage espec.

In this paper, by using the matrix representation of the generalized quaternion algebra, we discussed solution problem for two classes of the first_degree algebraic equation of the generalized quaternion and obtained critical conditions on existence of a unique solution, infinitely many solutions or nonexistence any solution for the two classes algebraic equation.

Managing semantic metadata based on ontology;

Research on Techniques of OWL Lite Based Semantic Metadata Populating;

The efficient description and production of semantic metadata is the key technology to the construction of semantic Web.

The paper began from studying the process that metadata was departed from underlying data,then the classification and definition of metadata were studied, at last we came up with the metadata in general sense and the metadata in narrow sense, .