Research-based Knowledge To Build Knowledge Of Digital Library Services

With the advent of knowledge economy, walking into knowledge service has become the necessity of the current age. During service transformation, it needs the evolution of paradigms including knowledge management on management mechanism, knowledge technology on applied technology, knowledge architecture on resource construction and digital library on service subject, and these evolutions are finally reflected in the realization of digital library knowledge architecture.Facing knowledge service, There has been systematic study on information architecture, but the study on knowledge architecture is just on the start. Therefore, the deep study on knowledge architecture and knowledge service in digital library needs the help of the theory information architecture and the compararision with knowledge architecture, in order to explore the basic principles and mechanism of knowledge architecture and the use of knowledge technology. So the text inteprets the information and knowledge transformation theory of knowledge architecture from Brookes Information Science Fundamental Equation, and search the source of the knowledge architecture mechanism based on knowledge element, which explains the knowledge element's core use and the principles in knowledge architecture. The theoretical basis for the implementation of digital library knowledge architecture is established. In constructuion knowledge architecture in digital library, knowledge architects, under the help of computer technology and cognitive theory, need to discover knowledge element in the structure analysis of text knowledge, and need to extract the knowledge elements and describe their entity by the basic principles of knowledge architecture, classificafy the indexes,constructs and expresses their ontology by human knowledge system combining semantic web technology. By what is mentioned above, build digital library's knowledge element warehouse and knowledge warehouse, annotate the word meanings. By using ontology technology, make digital library's knowledge organization system semantic interconnection and interoperability, and form knowledge reasoning retrieval mechanism based on ontology for digital library. Due to different service subjects'heterogeneity of knowledge organization and distribution of storage, digital library has to build multiple space knowledge grid system and semantic grid, optimize the knowledge space, semantic space and users space of digital library knowledge service system, and then harmony them together in order to realize the dynamic polymerization of the distributed and heterogeneous knowledge at the digital library, and hence finish the complicated task of the digital library knowledge architecture, and reach the mutual comprehension and semantic match between users'requirement and knowledge warehouse.In accordance with the ontology reasoning retrieval mechanism which the digital library knowledge architecture based on element has, the text gives its model of ontology reasoning retrieval based on element, and explains that the retrieval mechanism of the semantic reasoning structure based on semantic Web. Thus, it can realize a multiplayer knowledge retrieval thrown data model retrieval, semantic retrieval and reasoning retrieval based rule which is achieved on basis of knowledge retrieval frame based on ontology. Finally, after careful analysis, it can comes to the conclusion that the digital library on the basis of knowledge architecture can provide various service functions such as knowledge discovery, knowledge innovation, knowledge navigation, knowledge mining and knowledge evaluation. Take CNKI grid resource sharing platform for example, analyze it's the degree for knowledge architecture on the basis of knowing the platform, and point out the advantages and disadvantages of the digital library based on CNKI platform, and prospect for improvement of the platform .By the study of the text, it will bring bright prospect for realizing the knowledge architecture of CNKI platform and its digital library's knowledge service in the end.