Ldap Protocol-based Integration Of Heterogeneous Data Sources, Key Technology Research And Information Sharing

With the development of information technology, the communicationsbetween all the departments of university become more and more. Duringthe application system of all the departments, because of the differenceof system structure, operating system and DBMS(Database ManagementSystem),it is difficult, even impossible to carry out information exchange,so the situation of many "detached information island" between the systemcome into being. Therefore, to make use of these unattached and dispersivedata resource, the departments of university need urgently to integrateheterogeneous data source and come into being a uniform accessinginterface, carry out share between heterogeneous data source.XML is rapidly emerging as a standard for exchanging data and metadatadescription. The advantages and characteristics of XML such asplatform-independent, easy to be expanded, self-describing, strongsemantic expression ability make it easy to describe structured data andunstructured data. It makes XML as an excellent choice for describingcommon schema in heterogeneous data integration.A directory can be regarded as a kind of database for a special purpose,it stores data based on object like a tree. Directory services is tostorage and manager resource information that distribute in differentareas, and provide a uniform resource list; Different from commonrational databases, it do not have the function of transaction processingand the data can be searched with a very high speed. A directory isusually used to store a large amount of basic data. Lightweight DirectoryAccess Protocol is the primary protocol which carry out directory serviceand it is a cross platform service.Base on the research of the XML technology, LDAP directory service,LDAP four model and Directory Services Markup Language, this paper chooseXML as a common data exchange schema and the validity of XML can be validated by XML Schema, to obtain the metadata in heterogeneous databaseby using JDBC and JDOM API under the J2EE environment; at last access LDAPDirectory Server by using JavaBean and DSML and form a uniform data accessplatform, application tier can look up and orient directory metadata andmanager these metadata in directory information storage.