DigitalLibraryService_省略_uteofEducationL
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第37卷增刊 2003年9月上海交通大学学报JOURNA L OF SH ANG H AI J I AOT ONG UNI VERSITYV ol.37Sup. Sep.2003 作者简介:Lucia Tsui ,Librarian ,HKIEd Library ;S idney Cheng ,Ass ociate Librarian (Readers ’Services ),HKIEd Library ;Ivan Chan ,Assistant Librarian(M edia &Systems Services ),HKIEd Library.T el :852*********,E 2mail :ivanchan @.hk 文章编号:100622467(2003)S120095206Digital Library Service Initiative ofthe Hong K ong Institute of Education LibraryLucia Tsui , Sidney Cheng , Ivan Chan(HKIEd Library )Abstract :This paper presented the philos ophy and the design concepts of the H ong K ong Institute of Education (HKIEd )Library Digital Library Service Initiative ,focusing on tw o in 2house developed digital library com ponents ,EdIS and Ed 2Video ,around its core digital library com ponents of the I NNOPAC Integrated Library System ,Library Website ,electronic res ources from vendors.Description on the development of these systems was made.K ey words :EdIs ;EdVideo ;Innopac ;digital library projects C LC number :G 250.7 Document code :AI ntroduction The major g oal of the H ong K ong Institute of Educa 2tion (HKIEd )Library is to provide the best services to li 2brary users seamlessly and efficiently.Since its inception ,the HKIEd Library has adopted an innovative digital li 2brary approach to build up its services and res ources.F or alm ost a decade ,the HKIEd Library has been developing its multi 2facet library services around its core digital li 2brary com ponents of the I NNOPAC Integrated Library Sys 2tem ,Library Website ,electronic res ources from vendors ,and in 2house developed knowledgebase systems.New ser 2vices and systems are being added in an ong oing basis. The HKIEd Digital Library Service Initiative began with a number of single systems ,each of which planned and developed separately.A fter the formation of the Li 2brary ’s Systems O ffice in 1998,all digital library com po 2nents have been planned with a holistic approach.All subsystems are integrated as parts of a whole. This paper presents the philos ophy and the design concepts of the HKIEd Digital Library Service Initiative ,focusing on tw o in 2house developed digital library com po 2nents ,EdIS and EdVideo ,with detail description on the development of these systems.1 Service Philosophy of the Digital Li 2brary Service I nitiative As stated in our Vision and Mission ,the HKIEd Li 2brary has positioned itself to be the leading technology based service provider in the region.It has dedicated it 2self to providing quality information services to students and staff of the Institute ,as well as to the community ,by developing res ources without prejudice and limitation to languages ,contents and formats.HKIEd Library is als o committed to ensuring a continuous free flow of informa 2tion using the latest state 2of 2the 2art technology. The HKIEd Digital Library Service Initiative is hence built upon three service principals ,namely ,quality of service ,availability of in formation ,and application of technology :(1)Quality of Services :All digital library com po 2nents have one comm on g oal 2to enhance the quality of ser 2vices provided to the users ,both external and internal.Any systems failing to deliver such g oal will be dropped for further development.(2)Availability of Information :Library ’s end prod 2ucts delivered to the users are always information based.Hence ,the digital library service com ponents facilitate li 2brary users to receive in formation they need in any for 2mats,any where,anytime.(3)Application of T echnology:A means rather thana g oal,advanced technology is the catalyst for realization of the first tw o principals.2 EdIS and EdVideo With the advancements in com puter,audio2visual and telecommunication technologies,multimedia res ources have become an integral part of library collection since mid1990’s.Entering into the21st century,library users now demand24x7access to multimedia res ources without geographical limitations.Since1996,the HKIEd Library had recognised the need for an imaging system of digital contents in multimedia formats.A fter evaluating the cont2 ents of different types of documents selected for digitisati2 on,specifications were drawn for EdIS(Education Imag2 ing System),the Library’s first knowledgebase system. As a result,in1998,four types of documents,i.e.cur2 riculum materials,student projects,news clippings and examination papers,were supported in Phase One of EdIS.When Phase T w o of EdIS was launched in2002,a new type of document,the HKIEd archival materials,was added to the system. In1998,the Library was granted permissions from local T V stations for recording their educational and cur2 rent affairs programs.Since then,T V programs have be2 come a fast growing and heavily used collection.Original2 ly recorded on VHS,the programs were later converted into VC Ds for easier storage and in preparation for digiti2 sation.In2002,to facilitate the viewing of T V programs by our students and staff,the Library s ought further per2 missions from T V stations to store and distribute the T V programs on the cam pus netw ork.Thus began the plan2 ning for a video2on2demand system. The information and services of EdIS are delivered on a single pre2defined platform,which inevitably re2 stricts the Library to take advantages of the rapid growth in web technology to support the new and innovative ser2 vices.Hence,when planning for the video2on2demand system,the Library has decided to adopt a multi2platform approach,which can save tremendous development costs and time on integrating new technology into the exiting services.The multi2platform approach is not only flexible and adaptive to the frequent updates of technology,it will als o enable the Library to react prom ptly to user needs. As a result,EdVideo(Education Video2on2demand Sys2 tem),the second in2house knowledgebase of the Digital Library Service Initiative,was developed and launched in early2003to provide video streaming service to students and staff of the Institute. As of May2003,digital contents of EdIS and Ed2 Video include:News clippings75,000clippingsExam ination paper400papersArchive materials1,600titlesT V programs4,000epis odes3 Design Concepts “Digital library”has been defined as“the collection of services and the collection of information objects that support users in dealing with information objects and the organization and presentation of those objects available di2 rectly or indirectly via electronicΠdigital means.”(Lein2 er,1998).This definition together with our service prin2 cipals formed the basic design concepts our Digital Library Service Initiative,i. e. to effectively identify,assemble,correlate,manipulate and disseminate in formation res ources and services to the end users via the Internet and Intranet. In addition to the basic design concepts,the follow2 ing characteristics were considered crucial in the planning of the digital library systems,especially the in2house de2 veloped systems:(1)Expandability:A digital library system must be able to extend its storage and handling capability for any new types of digital data.In the ever2changing technology w orld,a design feasible for expansion at reas onable costs enables new initiatives for digitalization.(2)Interoperability:A digital library system cannot operate independently from other systems.It has to inter2 act and communicate with other digital library systems such as OPAC,web server and other databases by using the standard protocol languages.(3)Sustainability:Maintaining the contents of a69上 海 交 通 大 学 学 报第37卷 digital library system is a continuing process,and is usu2 ally carried out by non2technical library staff.A user2 friendly content management interface is hence essential for streamlining the digitisation processes of data captur2 ing,editing,OCR,metadata and contents uploading. The content management interface should als o allow for the direct im port of the original data s ources into the sys2 tems.T o achieve its service g oals,a success ful digital li2 brary system requires not only s olid technical and theoreti2 cal foundations,but als o contributions and ideas from end2users and operators.The HKIEd Digital Library Ser2 vice Initiative is therefore the brainchild of the Library Staff with different expertise.Library professionals w orked as a team in the planning and design of the tw o in2house digital library systems.The Librarian oversaw the devel2 opment of the system,providing directions and guidelines in different stages of planning and development.The Sys2 tems Librarian was the project leader who coordinated the whole planning and development processes and looked af2 ter the technical requirements.The Bibliographic C ontrol Librarians and the In formation Services Librarians helped with the design of the data structure and indexing at2 tributes of the documents.The In formation Services Li2 brarians als o contributed ideas to the requirements and configurations of search engine and front2end user inter2 face.The Media Res ources Librarian w orked closely with the Systems staff on the digitisation of multimedia cont2 ents.The Readers’Services Librarian participated and contributed in different stages of development from the end users’perspectives. The system architecture of HKIEd Digital Library Service Initiative is shown in Fig.1.Web interface is used to interact with user queries and in formation search2 es.The system will respond to the user requests and pro2 cess them by the Search and Index Engine.The results may be text form andΠor links to image,video or audio files.The system will then guide the user to retrieve the required data file via the Access C ontrol Engine. This m odel,however,has the problems of multiple content management systems and cross platformsearches.Fig.1 Design architecture of HKIEd digital library service ini2 tiative4 The EdIS Model4.1 Definition of Document TypesDifferent document types,i.e.particular s ources of in formation to be converted into digitised format such as news clippings and examination papers,were defined for inclusion in EdIS.C omm on characteristics were identified for grouping the documents into a single system.The five document types supported in EdIS Phase2are:T ab.1 Ch aracteristics of different document types in EdISD ocument T ypeCharacteristicS till Image Audio Video UR L Reference Newspaper clippings Y es N o N o N oExam ination papers Y es N o N o N oArchival materials Y es Y es Y es Y esS tudent projects Y es Y es Y es Y es Curriculum materials Y es Y es Y es Y es The system architecture of EdIS is shown in Fig.2. The system consists of three major layers:C ontent Man2 agement Layer,C ontent C ontrol Layer and Database Layer.The C ontent Management Layer is a pre2processing centre of content materials to be digitised.It interfaces with scanning device,OCR s oftware,indexing,uploading and processing of digital contents to the media content storage and the C ontent C ontrol Layer.At the middle lev2 el,the C ontent C ontrol Layer interacts with the Web Browser via the Search and Index Engine,the Access C ontroller and the Web Presentation Manager.The Search and Index Engine controls the search requests and index2 ing of digitalization contents,whereas the Web Presenta2 tion Manager reformats the data from the Access C ontroller and presents them in HT M L format to the Web Browser.79 增刊Lucia Tsui,et al:Digital Library Service Initiative of...At the bottom level ,the Database Layer stores the digital in formation attributes into an arbitrary in formation reposi 2tory form ,taking its advantages of facilitating document searches and readiness for extension to new documenttypes.Fig.2 System design of EdIS imaging system4.2 Search C apabilityEdIS provides Boolean ,wildcard and proximity search functions ,details as follows (T ab.2):T ab.2 Search Functions of EdISOperatorSearch S tatementRetrieve Records C ontainingAND“education &China ”“education and China ”BOTH “education ”and “Chi 2na ”OR“teacher |student ”“teacher or student ”EITHER “teacher ”or “stu 2dent ”NOT“education !China ”“education not China ”“education ”but NOT “China ”W ildcard“learn 3”K eyw ords which begin with “learn ”,such as “learn ”,“learner ”,“learning ”,etc.Proxim ity“China education ”“China near education ”“China ”and “education ”within the same sentenceNesting“(teacher &student )!school ”Precedence indicated , e.g.“teacher ”AND “student ”but NOT “school ” T extual contents of appropriate document types such as news clippings ,examination papers and archival mate 2rials are converted into text format by OCR.Full 2text key 2w ord search is thus available for m ost document types.4.3 Maintenance of Digital Contents in EdISA C ontent Management System (C MS )is im ple 2mented for content update of EdIS.Digital contents can be updated by three means :(1)C MS W orkstation -A data inputting w orkstation for all document types.It streamlines the com plete digiti 2sation procedure and covers scanning ,bilingual OCR ,content editing ,indexing and data uploading.The sim ple user interface allows non 2technical staff to process the da 2ta efficiently.(2)Batch Uploading -F or news clippings supplied daily by commercial vendor.Staff time spent on process 2ing individual news clippings can hence be kept at min 2imal level.(3)Library Catalogue -Archival materials are in 2cluded in Phase 2of EdIS.In order to synchronize records of Library Catalogue and EdIS ,related biblio 2graphic data from I NNOPAC are im ported to EdIS direct 2ly.4.4 Advantages of EdIS System Design The document 2type 2oriented design m odel of EdIS ensures an integrated database structure for a particular s ource of materials. Through an arbitrary information repository ,search queries can be performed within a single document type or across all document types. C ontent updating is managed by a standard user 2in 2terface.Operational staff is not required to learn a new management interface when a new document type is added to the system.4.5 Limitations4.5.1 Cross Platform SearchStarted as a standalone knowledgebase ,search queries generated in EdIS still cannot be linked up to OPAC and other library databases.Multiple searches ,e.g.broadcast searches in Z 39.50protocol ,are not sup 2ported in EdIS.4.5.2 Cross Platform LinkageAs a standalone knowledgebase system ,EdIS does not provide an UR L link at title level directly.An article or title level EdIS document thus cannot be linked up di 2rectly to and from other systems or databases.4.5.3 Limitations on Handling S pecific D ocument T ypesThough designed for digital data in multimedia for 2mats ,methodology for EdIS to handle contents from multi 2media C D 2ROM applications still needs to be developed.89上 海 交 通 大 学 学 报第37卷 Multimedia C D2ROMs usually contain data in vastly di2 versified formats,including executable programs,audio2 visual data and interactive functions like drawing,paint2 ing,profiling,etc.System requirements for different ver2 sions of different operating systems and plug2ins,e.g. Windows3.1or Mac OS,further com plicated the situ2 ation.The Library is therefore still exploring the m ost ef2 fective way to capture the multimedia C D2ROM applica2 tions into EdIS.5 The EdVideo Model5.1 System Design Figure3shows the system architecture of EdVideo. Similar to EdIS,EdVideo is als o com posed of three major layers.The C ontent Management Layer at the top level is the data pre2processing centre.Different s ources of video programs in analog or digital formats are converted into Micros oft video streaming format.Program attributes con2 taining epis ode in formation and program synopses are als o inputted in this layer.At the middle level,the Video Management Layer consists of tw o major com ponents2 Streaming C ontroller and Access C ontroller.When a user selects a T V program from the web2based epis ode guide, the Streaming C ontroller will execute license control mechanism to prevent multiple access of the same T V pro2 gram.It will als o prevent the Streaming Sever from ex2 ceeding the maximum video connections,hence safe2 guarding the Cam pus Netw ork from flooding by video da2 ta.The Access C ontroller will detect the requester’s IP address and only permit access from w orkstations on cam2 pus.At the bottom level,the Database Layer is responsi2 ble for storage of video contents,attributes and metadata.5.2 Linkage to External SystemsUnlike EdIS,title level UR Ls can be generated from EdVideo.The UR Ls will then be recorded in tag856of the related MARC records in I NNOPAC System,through which the users will be redirected to individual EdVideo programs from the OPAC.On the other hand,linkage to OPAC records is provided in EdVideo by using the call numbers as linking keys.5.3 Maintenance of Digital Contents in EdVideoEdVideo handles large v olume of digital video.A di2 rect data uploading function is built for processing the dig2 ital video data in addition to the Video C ontent Manage2 ment W orkstation.Direct data uploading has the meritofFig.3 System design of EdVideo video2on2demand system independence from the design of the Video C ontent Man2 agement W orkstation,while at the same time it can han2 dle batch processing of retrospective data in large quanti2 ty.5.4 Advantages of EdVideo System DesignThe multi2platform approach allows the Library to save development cost and time on enhancing the Digital Library Service Initiative to support new user demands by utilising newly developed technology.EdVideo could hence be developed and upgraded rapidly and indepen2 dently from other Digital Library com ponents.5.5 LimitationsDigitisation of video contents is a m ore com plicated process than the digitisation of textual and image cont2 ents.It inv olves conversion of analog video signals into digital video signals,video editing,tuning of audio quali2 ty,etc.Therefore,it cannot share the C ontent Manage2 ment W orkstation with EdIS and a separate Video C ontent Management W orkstation is necessary.Additional training for non2technical staff is required for using a new user2in2 terface and procedures for preparing and updating the vid2 eo contents and metadata.6 Future Development of HKIEd Digi2 tal Library Service I nitiative6.1 One2stop ServiceThough web browser is used as the comm on interface for all com ponents of the HKIEd Digital Library Service Initiative,users still need to execute search queries and retrieve results separately in different systems.Essential99 增刊Lucia Tsui,et al:Digital Library Service Initiative of...in formation,in particular the metadata,may be missing due to the absence of direct linkage am ong related knowl2 edgebase systems.Direct retrieval of related in formation across different systems is therefore an im portant g oal of the Digital Library Service Initiative.The Library is con2 sidering adopting the OpenUR L protocol as well as other open standards such as X M L,in its in2house knowledge2 bases.These standard protocols,together with the Li2 brary’s new mega2search engine,will provide users with a one2stop service interface for searching and retrieving the required in formation from all our digital library service com ponents.6.2 N ew Contents and N ew Services to Meet theN eeds of U sersOur experiences from the development of EdIS and EdVideo reinforce our belief that digital contents which meet the needs of our users are the essential success ele2 ment of any digital library service system.The Library is now planning to build m ore digital contents in response to and in anticipation of the needs of users.T o support the special need for curriculum materials,we are studying the feasibilities to include local educational materials such as primary and secondary school textbooks in EdIS.H owev2 er,lengthy and difficult neg otiations are expected with the content owners on res olving the copyright and royalty is2 sues.We are als o planning to add m ore user2friendly li2 brary services such as virtual reference,online document delivery,and My Library homepage with selected e2re2 s ources of pers onal interests as part of our Digital Library Service Initiative.6.3 H ardw are DevelopmentThe Library will als o keep track of the development in hardware and its im plications on digital library servic2 es.F or instance,pers onal digital devices such as pocket PC,Palm,etc.are becoming m ore and m ore popular and mature.They will provide an ideal portable platform for direct delivery of information.7 ConclusionT o conclude,we have faced many challenges during the various stages of development of our Digital Library Service Initiative,such as technical problems in digitisati2 on processes,image file processing,OCR and metadata building,as well as res ources problems in contents acqui2 sitions and development,and copyright issues.S ome problems have been res olved while others still require fur2 ther system enhancements,availability of new technolo2 gies,or external supports.H owever,the experiences we have gained during the processes will form the basis of our future development,and we are happy to share them with colleagues in other libraries.R eferences:[1] Leiner B M.The scope of the digital library[E BΠO L].[2] http:ΠΠw w ΠmetricsΠpublicΠpapersΠdig2lib2scope.ht2ml,1998210215.[3] National In formation S tandards Organization.Draft OpenUR LS tandard,version2[E BΠO L].[4] http:ΠΠΠopenurlΠD ocumentsΠOpenUR L-Draft-S tandard-Edited-03.doc,200127231.001上 海 交 通 大 学 学 报第37卷 。