Research On Semantic Annotation Based On Upper-level Ontology Integration In Medical Field

With the high-speed development of the information technology, the role that theinformationization construction plays in promoting the exchange of the knowledge in themedical field has become more and more prominent. The quality of medical and healthinformationization construction depends on the scientific and effective medical informationresource organizations, and the medical field involves a great number of disciplines and a lotof knowledge in them are interleaving with other disciplines, making the knowledge in thefield complex. At present, the application of the medical information resources tends to thedevelopment in the network, a great number of information resources have been established.The information isolated islands, which are difficult to be identified semantically have beenestablished, and the traditional information organization mode has gradually become difficultin meeting the demand of transmission of the current medical information.The Semantic Web technique has provided the new plan for resolving the sharingproblem of medical information resources. As the support technique of semantic applicationoriented to the next-generation network information resources, it can make the data processedand inquired in the form of machine understanding and realize the data interpretation andexchange between the computers via a series of languages, tools and techniques. As one of thecore techniques of the Semantic Web, the ontology can better express the semantic levels ofthe knowledge in such a field, and Semantic Annotation can use the ontology into the hugeinformation resources, make the resource as knowledge which has formal informationarchitecture with semantic relationships. Nonetheless, because the semantic isomerizationbetween the domain ontologies is more prominent, the semantic enrichment of semanticannotation is restricted, and the semantic annotation is just the general knowledge hierarchyfor indicating the upper-level semantic relationships of domain knowledgement.The ontology semantic annotation mechanism with the semantic relation structure of theupper-level ontology in the medical field is studied via innovation and building of ontology,mapping and integration of ontology and semantic annotation, etc., an attempt is made tobuild semantic annotation system model of the medical field ontology based on theupper-level ontology integration, demonstrate the new thoughts of semantic annotation,explore the role of the ontology integration in promoting the semantic annotation effects, tryto realize the starting from the actual situation, study and resolve the semantic applicationbarriers of ontology existing in the reality so as to improve the semantic annotation level ofmedical information resources, promote the semantic application oriented to the networkmedical information resources and advance the sharing and knowledge discovery of medicalinformation resources. The contents of the thesis are mainly dealt with by focusing on thefollowing chapters: Chapterâ… introduces the time background and technical background of the topic of theproject, describes the present situation of development of the theory and technique related tothe project, points out the theoretical and realistic significance of the project, present thetargets, contents and methods of the project and the planning and layout is carried outaccording to the research thoughts.Chapter â…¡ systematically describes the basic theory and principles of mutual operationand semantic annotation with ontology. Discourse upon the main application techniques of thesemantic annotation based on upper-level ontology integration, mainly including somerelevant techniques such as ontology theory and relevant building of ontology, mapping andintegration of ontology, etc., semantic annotation theory and relevant technical methods, etc.Chapter â…¢ deals with the relevant mainstream tools and platforms of mapping andsemantic annotation of ontology in the relevant fields and the new methods and systemsoccurring in recent years in details and syudies the methods and techniques use by thesystems in details, compares the representative systems and summarizes the technicalcharacteristics and application directions for construction of the Semantic Annotation Basedon Upper-level Ontology Integration System.Chapter â…£ studies the structure characteristics of information resource in the medicalfield, and analyzes the pattern of semantic annotation based on upper-level ontologyintegration.Chapter â…¤ design the domain ontology construction, domain ontology mapping,ontology integration and semantic annotation mode of medical information resources indetails basing on the analysis above, systematically discusses the semantic annotation methodelements of medical field information resources based on the upper-level ontologyintegration.Chapter â…¥ designs and realizes the semantic annotation system of medical fieldinformation resources based on the upper-level ontology integration, introduces theupper-level ontology in the medical field to carry out the knowledge ontology construction,ontology integration and whole process test of semantic annotation for the medicalinformation resources, demonstrates the feasibility of the semantic annotation plan, tests theusability of the semantic annotation system, summarizes and discusses the problems occurringin the semantic annotation and characteristics of the system.Chapter â…¦ summarizes the work done in the whole thesis and draws the conclusion andgives an outlook to the development prospect of the relevant semantic annotation researchbased on the upper-level ontology integration in the future.The thesis realizes the semantic annotation of the medical information resources based onthe upper-level ontology integration and demonstrates the feasibility of the medicalupper-level ontology used for the domain ontology integration and semantic annotation. Theresearch results show that the semantic annotation system based on the upper-level ontologyintegration is reliable, it has the post-treatment advantage to take the upper-level ontologyattribute structure as the semantic relation basis of the domain ontology, the semanticmapping and ontology integration based on the upper-level ontology is feasible and it iseffective to take the integration ontology to carry out the semantic annotation of medical fieldinformation resources. The ontology building process in the medical field is realized and optimized from the level of practice, which provides the new plans for the mutual operation ofontology in the medical field, expands the semantic annotation thoughts of medicalinformation resources and lays a good foundation for the advanced semantic application ofmedical information resources.The semantic annotation method taken in the project is different from that of theannotation system with the single traditional ontology as the model and different from thecurrent multi-ontology integration mode, the integration ontology annotation strategy basedon the semantic structure of the upper-level ontology in the medical field is taken, thesemantic annotation mode of integration ontology with the upper-level ontology as theintegration element is presented, based on which, the prototype system of semantic annotationin the medical field is built so as to explore the new thoughts of semantic annotation modebased n the medical ontology and provide the reference for the ontology to realize theadvanced semantic application. The detailed innovative points of the project are representedas follows:First, the upper-level ontology attribute structure is applied in the building of domainontology. The method of upper-level ontology attribute expansion is taken to express theknowledge relation of domain ontology. The domain ontology built in such a mode has therelatively uniform semantic expression framework, and it is able to keep the good exchangewith the upper-level ontology and promote the mutual operation of ontology. The knowledgeterms occurring in the research have the reliable sources; both Chinese and English that canbe freely transformed are taken in the expression of the contents; the ontology built has thecharacteristics of the upper-level ontology attribute structure.Second, the semantic relation of the upper-level ontology attends the ontology integration.The attribute integration is carried out on the basis of the upper-level ontology attributeframework, the domain ontology integration is realized and the integration ontology isestablished on the basis of the ontology concept mapping. The integration ontology built insuch a mode has the clear semantic framework. Because of the consistence of semanticrelation expressions, it is of importance of guiding the subsequent ontology integration.Third, the semantic annotations of ontology are integrated on the basis of the upper-levelontology. Relative to the semantic annotation of the single traditional ontology, the integrationontology is characterized as the richer knowledge system; relative to the unrelatedmulti-ontology semantic annotations between the pieces of domain ontology, the integrationontology is characterized as closer knowledge relevance; relative to the pure mappedmulti-ontology semantic annotations, the semantic annotations based on the upper-levelontology integration are characterized as more complete knowledge expression.