With the rapid development of Internet technology, the global exchange and sharing of information resources is becoming a reality. As a cornucopia and distribution center of information resources, the emergence of the Internet has brought unprecedented opportunities for development. How to build, manage and publish your own information resources and provide a powerful, convenient and fast information query service through the WEB website, so that readers can retrieve and utilize the rich collection of information resources has become the primary problem solved by the library in the process of digital construction.
In October 2001, the library of China University of Mining and Technology (Xuzhou Headquarters), after comprehensive comparisons and rigorous demonstrations, selected iBASE series software with iBASE iPAC library document information resource publishing and retrieval system as its core and applied it to its characteristics Database construction, information resource management, and the construction of library WEB sites and information services have made the iBASE database a core platform for the digital construction of the China University of Mining and Technology, which has greatly promoted the characteristic library, thesis library, and navigation library of the China University of Mining and Technology. And the construction of the library website, and provide a complete information query service system for readers inside and outside the school, and achieved good response.
2. Why choose iBASE database?
Why didn't the China University of Mining and Technology library choose the domestic iBASE database instead of the famous relational database product abroad? The technical staff of the China Mining University Library believes that an important reason is that the iBASE database is limited to the storage mechanism and indexing mechanism of the relational database, which makes it meet the requirements of the library's actual business and digital construction in terms of technology and performance. :
In the definition of database structure, iBASE database uses repeated fields and sub-fields to achieve variable-length storage of data, completely solving the problem of definition of variable-length fields and repeated fields that are common in library business, and realized the realization of variable-length fields, repeated fields and sub-fields. The definition, storage and management of fields, and the number and length of records, the number and length of fields, and the number of repeatable fields can be unlimited, allowing data items to be multi-valued and containing subfields, which can fully meet China University of Mining and Technology Books The library has special management requirements for data processing.
In terms of data description format, the iBASE database not only supports the international standard (ISO-2709, MARC, CCF) and domestic standard (CCFC) formats, but also supports the latest SGML and XML formats. It is extensible and can be linked to other metadata units ( Project) Connected to use, not only suitable for the application of Chinese full-text retrieval system platform, but also in line with the development trend of international digital library standardization, which is convenient for international exchange and integration, which is extremely important for library database standardization and data exchange and sharing Important role.
In terms of data processing objects, iBASE database adopts object-oriented technology, with XML technology as its core. It can not only process popular file type data such as TXT text, DOC, EXCEL, PPT, PDF, but also image, audio, video, Computer programs and web site resources are cataloged and digitized, can support the storage of various types of unstructured data (text, images, video, audio OLE objects, etc.), support the XML file format, and truly realize the storage and management of massive digital information. It provides a powerful data management platform for libraries to manage various digital information resources.
In terms of information retrieval, iBASE database has built-in full-text search function in the core of the powerful database engine, which avoids the problem of having to purchase an additional full-text search component when using a relational database. It has a powerful information retrieval function. It is based on Chinese natural language processing technology, using reverse gear indexing technology and the world's leading B * indexing algorithm, so that the retrieval speed of the database is no longer affected by the number of database records, and the retrieval speed achieves second-level response of massive data, compared with relational databases. The query speed is more than 10 times faster; at the same time, distributed processing technology, intelligent retrieval technology and data mining technology are introduced to achieve intelligent, efficient, fast and flexible information retrieval and content-based query, greatly improving the speed and depth of information retrieval To meet the needs of massive data retrieval in digital libraries.
3. The specific application of iBASE database in the construction of digital libraries
The iBASE series software purchased by the China University of Mining and Technology library is mainly the iBASE DMC data management center and the iBASE iPAC library document information resource publishing and retrieval system. Its specific application is:
Characteristic database construction
Taking advantage of the convenient and quick database construction function provided by the iBASE DMC data management center, the China University of Mining and Technology Library has established six specialty databases including rock formation control database, mining subject navigation database, foreign journals, academic conferences, dissertation and teaching reference database. Among them, the mining subject navigation database, dissertation database and academic conference database are all sub-projects of CALIS. At the same time, the library of China University of Mining and Technology also uses the powerful data conversion function of iBASE DMC to pour various bibliographic databases, abstract databases, full-text databases and CD-ROM data that were originally established with database software such as dBASE, Foxpro and CDS / ISIS into the iBASE database , Unified the data format, and laid the foundation for the public exchange of data and the extensive sharing of information resources.
Library Information Service Site Construction
Using the iBASE iPAC library document information resource publishing and retrieval system, the Library of China University of Mining and Technology established a library information service website (http://211.70.215.36), which is part of China University of Mining and Technology and is divided into a brief introduction, 9 columns, including dynamic news, information services, BBS, reader opinions, and friendship links, can be added, modified, and deleted at any time through background management. Among them, dynamic news is divided into industry news, library news and new book announcements. All information can be submitted to the library remotely through the browser in the background and realized dynamic release, while providing readers with the full text retrieval function of the news.
Dynamic publication and query access of literature resources
It is the ultimate goal of the digital construction of the library to dynamically publish various resources online to achieve the sharing of resources. Using the powerful publishing function of the iBASE iPAC library document information resource publishing and retrieval system, the China University of Mining and Technology library does not require any programming. You can publish special databases such as rock formation control database and subject navigation database. Because the system uses advanced template technology, the system extracts data from the database to dynamically generate or update web pages according to the template format, thus greatly reducing the burden on library managers.
For the release of database resources on the Internet, the system provides a perfect search function. It not only supports general full-text search, but also supports a variety of complex search methods such as group search, forward consistent search, ANY search, Boolean logic search, secondary search, and web-based post-control vocabulary management and search, thereby greatly facilitating In addition, readers can deeply explore and use literature information resources, and provide readers with perfect services.
Perfect system management function
According to the copyright and information security issues faced by digital libraries, the iBASE iPAC Library Document Information Resource Publishing and Retrieval System also provides role-based user rights management, policy-based billing management, and improved security certification management and graphical interface maintenance management mechanisms . The Library of China University of Mining and Technology can provide a multi-level user management mechanism according to the role of readers to ensure that only authorized users can access related resources; at the same time, it can provide a billing management mechanism based entirely on management strategies; , Simple operation, can greatly reduce the labor intensity of library managers.
4. Operation effect
At present, the Library of China University of Mining and Technology has completed the construction of the characteristic database and library information service website and the online publication of document information resources. It can provide network-based press releases, document queries and communication with readers for teachers and students on campus. Information service. At present, the system is running stably and its functions are complete, and it has been able to fully guarantee the activities of teaching, scientific research, management and other activities on library literature information.
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