Research On Knowledge Organization Based On Concept Lattice Of Digital Library

Since the 1990s, with the development of computer and network technology, theconcept of the library is gradually moving beyond that big steel and concretebuildings in which people's sense of tradition. Digital library with the features,storage and presentation of digital, network-based retrieval and access, is amulti-function distribution and integration of knowledge center which is set ofknowledge storage, access, dissemination, exchange in networked digital era. Thestudy of digital library is becoming an important branch of modern library andinformation science, and acquires relatively independent development space andposition in support of multi-disciplinary theory and technology. During this period,the academic community set off a craze of the study on the theoretical explorationand practice of digital library, in particular, many outstanding achievements haveobtained in resources building of digital library.However, with the rise of of Web 2.0 and the development of the semantic webin recent years, the knowledge management of digital library is facing many newproblems and challenges in open semantic web environment. Digital libraryknowledge organization is the most basic and salient core focus in these issues. Howto grasp the basic context and direction of development of the digital libraryknowledge organization, with the integration of multidisciplinary theories andtechniques, through accurate analysis and in-depth studies to explore the internalmechanism and evolution law of the digital library knowledge organization in thesemantic network environment, to build a theoretical framework and blueprint for thedevelopment of digital library knowledge organization in the open semantics webenvironment, to promote rapid growth and development of the digitalknowledge-based industries in China, has become a major issue to be solved.In view of this, with the base of formal concept analysis (FCA) and conceptlattice (CL), which are the latest research in the conceptualize knowledge processingin the field of data analysis of international academic community, from theconceptualize, semantic, formal perspective of knowledge, the digital libraryknowledge organization is studied. This dissertation commits to construct the modelframework of digital library knowledge organization with concept lattice theory andtechnology based on formal concept analysis, to innovate the technology strategy of the digital library knowledge organization, to promote the process of practice ofdigital library in the open semantic web environment. Specific studies include:(1) Starting from the literature survey of the progress of application of formalconcept analysis and concept lattice in the conceptualize knowledge processing athome and abroad, and theoretical studies of digital library knowledge organization,detailed outlines and analysis are executed based on survey data. It focus on theconcept lattice theory and technique based on formal concept analysis for varioustypes of knowledge organizations and services in the digital library, sums up the coretheory, the necessary methods and key technologies for this project. And through theanalysis of the evolutionary path of knowledge organization system to explore theplight and development trend of the current digital library knowledge organization,the research route and logical starting point of this study are defined clearly.(2) By the research of users'knowledge organization of digital library based onconcept lattice, from the mining and extraction on users'implicit knowledge ofdigital library, the functions and advantages on identification of users knowledgeneeds, analysis of concept cognition, mining of behavioral preferences and otherfeatures are explored, in which formal concept analysis and concept lattice theoriesare applied to the digital library knowledge organization. And these advantages areextended to emerging field of digital library such as community taxonomy(Folksonomy) and open access (OA), theoretical support and technical guarantee onthe knowledge organization of digital library based on formal concept analysis andconcept lattice theory and technology are elaborated in open distributed semanticnetwork environment, the scientific nature and effectiveness of the digital libraryknowledge organization based on formal concept analysis and concept lattice theoryand techniques are demonstrated.(3) The concept lattices of the knowledge in related fields are constructed. Theresearch on semantic and conceptualize knowledge within specific areas of digitallibrary (including the implicit knowledge and explicit knowledge) is executed. Basedon the objects and attributes of knowledge concept, the formal context is created, theconcept lattice of domain knowledge is constructed with formal concept analysistechniques, the formal conceptualization description of domain knowledge isachieved. The structures of knowledge in specific areas are analyzed and presentedbased on the concept lattice of domain knowledge, the hierarchy and the relationshipbetween knowledge are displayed, the potential implicit rules and patterns are minedand discovered.(4)'Complementary Fusion between Ontology and Concept Lattice'as a noveltechnology strategy of digital library knowledge organization is proposed. From thephilosophy to the library and Information science, from epistemology to ontology,from implicit knowledge to explicit knowledge, combined with the actual development of open semantic network, the digital library knowledge organizationtheory and the theory of concept lattice based on formal concept analysis areanalyzed and researched comprehensively, systematically and deeply. Based on theabove study, complementary integration on'ontology concept lattice'astechnology strategy of digital library knowledge organization is proposed.(5) The construction of domain knowledge ontology is realized based on conceptlattice. Two main types of knowledge resources in digital library, thesaurus and text,are analyzed, and the concept lattice of heterogeneous resources is constructed byapposition and overlap operations. Through the mapping rules between the domainknowledge concept lattice and domain ontology, domain ontology is built on the basisof the domain knowledge concept lattice. Building ontology by concept latticeimproves the degree of formal and automation of ontology construction, greatlyreduces the man-made interference factors of ontology construction, and achieves thepositive promoting of'concept lattice ontology'.(6) The mappings crossing heterogeneous ontologies are established based onconcept lattice. The reverse resolving of related domain ontology is executed basedon concept lattice, the relationships of synonyms, hyponyms and other relations instandard dictionary are embedded in concepts of knowledge and hierarchy ofontology, different heterogeneous ontologies are converted into the correspondingconcept lattices, and the effective concepts of knowledge are extracted. Then basedon the properties and objects of concept, the'Object-Attribute Similarity (OAS)'method based on concept lattice is presented creatively. Using this method tocalculate the similarity of the concepts which are acquired by reverse resolving, and'pair of concepts'across heterogeneous ontologies are extracted under therequirements to meet the threshold, the mapping relationships across heterogeneousontologies are established based on similar'pair of concepts', the reverse resolutionof'ontology concept lattice'is achieved.(7) The knowledge-map of multi-ontologies collaboration is constructed basedon concept lattice. From philosophy and information science point of view, itanalyzes and summarizes the state of ought-to-be and performance of to-be of humanknowledge systematically, analyzes and discourses the current ontology process ofknowledge and knowledge-map as an ultimate performance of knowledgeorganization, builds the theoretical foundation for construction of multi-ontologiescollaboration system based on concept lattice. It selects the typical representativemature domain ontologies in specific areas, across ontologies mappings areestablished based on concept lattice, and accordingly to build a knowledge-map ofmulti-ontologies collaboration, in order to achieve a wider range knowledgeorganization with the form of'Jigsaw Puzzle'. Based on formal concept analysis and concept lattice theory and technology,solving related issues of digital library knowledge organization in open distributedsemantic network environment as a logical starting point, on the basis of combing andsummarizing the applications of formal concept analysis and concept lattice in relateddomains, this dissertation sums up and analyzes the evolution of knowledgeorganization and its architecture, studies and explores the technology strategy andframework model of digital library knowledge organization with integrated usage ofknowledge organization theory, body theory, concept lattice theory, semantic theory,comprehensively, deeply and systematically. It builds the concept lattice ofknowledge in related domains, complementary fusion between ontology and conceptlattice as a novel technology strategy of digital library knowledge organization isproposed. Accordingly, the construction of domain ontology on heterogeneousresources in digital library and across ontologies mappings are achieved, andknowledge-map of multi-ontologies collaboration is established on this basis.The theoretical value of this dissertation is to enrich and improve the theoreticalsystem and methodology of digital library knowledge organization, to promote thetransformation and revolution on theories and methods of digital library knowledgeorganization in modern semantic network environment. Mining and discovering theusers'implicit knowledge are new growth points of the digital library knowledgeorganization theory, complementary fusion between ontology and concept latticeprovides a new theoretical support and solutions for knowledge description,knowledge organization, knowledge navigation, knowledge construction. Thepractical significance of this dissertation is to enhance flexible nature of digitallibrary knowledge organization system for meeting the practical needs of the digitallibrary practice in the current semantic web environment. By establishing theknowledge-map of multi-ontologies collaboration, the digital library knowledgeorganization based on concept lattice, presents and discovers the structure andassociation of knowledge conceptually, semantically and formally, increases theefficiency of knowledge access and utilization of digital library users, better releasesand produces the potential and value of digital libraries in the modern semanticnetwork environment.