Research Of E-government Information Exchange Technology Based On Ontology

Heterogeneous database is composed by a group of interconnect and autonomous member databases. These members communicate with each other, so as to exchange information and answer query. Since the objects in one member database may be very different from those in the others, it is difficult to absorb their semantics into one integrated database. Therefore, it is necessary for us to consider different semantics, and to make an accurate transfer rule from one expression to another. In this dissertation, we put our research emphasis on the heterogeneous data resource information exchange of electronic governmental documents based on ontology ,as to building a direct and standardize semantic level from now system and it may do semantic interoperation, Besides, we make a unified technical standard to guarantee the inter-platform electronic document exchange between the intranet of different government offices, direct and standardize the construction of government office network system, so as to realize the goal of unified platform, unified network and unified standard, to speed up the document flow between different government offices, to improve office efficiency and make full use of resources.OWL DL being established by W3C, is a knowledge representation markup language for the semantic web. OWL DL is a new synthesis of research on KRML for the semantic Web, which needs to be expressive enough for representing knowledge and computationally tractable for inference of large scale applications. In this paper,; the corresponding relation between OWL DL and description logic is analyzed, So the research conclusions of description logic can be applied to OWL DL , and the foundation of investigating KR and reasoning problems for OWL DL is established.An ontology is a common, shared and formal description of important concepts in an specific domain. An ontology is a formal explicit representation of concepts in a domain. properties of each concept describes characteristics and attributes of the concept known as slots and constrains on these slots. Domain ontologies is composed of attributes,object,relationships and sub-Domain ontologies. Domain knowledge is described in detail with ontology, and abstracted conceptualization semantic level, which provides semantic concepts for the subsequent research on semantic inter-operation.E-government data element is one of the key technologies in information exchange of E-government. it support a base for interoperability of E-government, With emerging of various kinds of data element the interoperability of data element, will be a focus, and important aspect of interoperability of E -government. The article pointed out the reasons of producing data element, interoperability, then summarized complete resolutions of data element interoperability, Pointed out that adopt a new technology and a way to research and carry out the data element interoperability ,this is a way using the domain ontologies of E -government to resolution of data dement semantic interoperability.Conceptual clustering is key about domain data mining and building domain ontologies Attribute-oriented induction is a method for data mining that has recently been widely applied, makes a study of that how the process of conceptual clustering incorporate the characteristics of the AOI process. An improved conceptual clustering method is also provided based on data element of E -government.Used existing the semantic relevance between domain ontologies, and proposes the possibility of building ontologies following the view of semantic match. Firstly, a structural definition of domain ontology is given. Secondly, the semantic relevance between domain ontologies is discussed and a definition of relevance degree is given Based on the evolution of population, using the relation between OWL DL and description logic,semantic relevant degree between domain ontologies,such as crossover and meaging domain ontologies from different domains at present etc, giving a new way to build the domain ontologies of E-government .In past few years ,Ontology is widely used in intelligent information retrieve, e-business, and network collaboration. Meanwhile, many applications require the integrated query from related information resources, which arises the problem of semantic interoperation in heterogeneous information resources is necessary. Ontology mapping is an effective method to realize the interoperation of heterogeneous Ontologies. A semantic based Ontology mapping method is proposed and concept properties are considered. Similarities of concept names, concept properties set are used to calculate semantic mapping relation between two Ontologies. Semantic radius makes the semantic mapping method more flexible.There are many complex factors in integrating them, because different ontology creators adopt different semantics from his individualview. The article discuss deeply the interoperation of the e-government domain Ontologies . A new effective method about building semantic mapping relation between part Ontologies and domain ontologies is proposed that adopt to combine with the semantic similarity, descriptive similarity, ontology integration, reasoning on ontology etc. to get ontologies semantic coherent.as a result .building a direct and standardize semantic level and it may do semantic interoperation from now system.Finally .as an application, given a model of E-government information exchange system based on ontology .