Z39.50: Information Retrieval protocol ppt
- 1. Topic: Z39.50: Information Retrieval Protocol BY SUNILKUMARSINGH KUMPAWAT MASTER OF LIBRARY AND INFORMATION SCIENCE SEM-1 DEPT. OF LIBRARYAND INFORMATION SCIENCE MAHARAJA SAYAJIRAO UNIVERSITY OF BARODA
- 2. Content i. Meaning ii. Definition iii. Features and Facilities iv. Benefits v. Functions vi. How Z39.50 works? vii.Versions viii.Attributes ix. Z39.50 Profiles x. Z39.50 in Libraries and Information centres xi. Z39.50 Globally xii.Advantages xiii.Disadvantages xiv.Current & Future xv. List of Different types of Protocols xvi.Conclusion References
- 3. Meaning Z39.50 is an international standard protocol used by networked computer systems for information retrieval. It enables information seekers to search different systems on a network or the Internet through the use of a single user interface. Parent Agency: ANSI/NISO: American National Standard Institute/National Information Standards Organisation Websites: www.ansi.org, www.niso.org Maintenance Agency: Library of Congress Website: https://www.loc.gov/z3950/
- 4. Definition ANSI/NISO Z39.50 – is a protocol which specifies data structures and interchange rules that allow a client machine (as called an “origin” in the standard) to search databases on a server machine (called a “target” in the standard) and retrieve records that are identified as a result of such a search.
- 5. Features & facilities 1) Initialization 2) Searching 3) Presenting record 4) Maintaining Multiple Search Results 5) Browsing 6) Sorting Of Results 7) Controlling Access 8) Controlling Resources 9) Extended Services 10) Termination Facility
- 6. Benefits Seamless access Resource sharing Increased productivity
- 7. Functions Main function is to provide information's to user’s by information retrieval. The basic function of Z39.50 is to negotiate a connection between the client and server on two systems, execute a search, and return the formatted results to the user’s screen. In a Z39.50 session, the Z39.50 client software that initiates a request for the user is known as the Origin. The Z39.50 server software system that responds to the Origin’s request is called the Target.
- 9. Versions 1. Version 1 was released on 1988 which was a standard way to provide bibliographic details i.e. core services 2. Version 2 formalized the structure of information to be exchanged based on the ISO standard data description language and encoding rules. Released on 1992 3. Version 3 the current version of the standard, builds on and includes version 2. Version 3 is extremely powerful in its support for simple to highly complex applications. The current version of the Z39.50 standard is formally known as ANSI/ NISO Z39.50-1995, Information Retrieval—Application service definition and protocol specification. 4. Version 4 was released on 2003.
- 10. Attributes Domain Specific Attributes Bib-1 - Bibliographic GILS - Government information locator service STAS - Scientific and technical DL - Digital library collections CIMI - Computer Interchange of Museum Information profile. GEO - Digital geospatial metadata, etc. Facility Specific Attributes CCL-1 - Common command language, Exp-1 - For use with an explain database, Ext-1 - for use with an extended service database.
- 11. Bib-1 - Bibliographic 1) Use attributes 2) Relation attributes 3) Truncation attributes 4) Completeness attributes 5) Position attributes 6) Structure attributes
- 12. Z93.50 Profile A profile is a detailed specification of Z39.50 features and functions that an implementation will support, improving interoperability by; Assisting customers in specifying requirements for Z39.50 products, Defining a core set of Z39.50 features to assist vendors in configuring their products, Increasing the market for Z39.50 products, Improving users’ success in information retrieval, and Leveraging local investment in Z39.50 by providing global access to resources.
- 13. Advantages & Examples It increases the reliability of results as a profile will define the attributes and attribute combinations, which are supported by server. Profile will help in standardising the server configuration. Examples: 1. GILS profile: Government Information Locator Service 2. ATS profile: The Author-Title-Subject 3. WAIS profile: The Wide Area Information Server 4. CIMI profile: Computer Interchange of Museum Information profile. 5. DL profile: Digital Library Profile. 6. CIP profile: Catalogue Interoperability Protocol profile. 7. ZSTARTS profile: a Z39.50 profile for STARTS (Stanford Protocol for Internet Search and Retrieval).
- 14. Z39.50 in Libraries And Information centers OPACS Catalogues/Bibliographies Union Catalogues Inter Library Loan (ILL) Selective Dissemination of Information Web Searching and Filtering
- 15. Z-39.50 Globally Z39.50 is recognized worldwide as the international standard for networked information search and retrieval. Internationally, many library software vendors, bibliographic utilities, commercial sector, and government organizations have adopted Z39.50 functionality in their products. The broad range of accessible information includes; Bibliographic data Government information Scientific and technical data Geospatial data Thesauri and other taxonomies Digital library collections Arts and humanities data Museum information
- 16. Advantages Any database that is Z39.50-enabled may be searched by using a single search interface, a single set of search commands and search strategies. Allows intersystem searching and record transfer irrespective of different software and hardware. Multi-database searching using single search interface. Virtual union catalogue--a combined catalogue of several libraries on diverse systems (without merging the catalogues) is possible. Interlibrary loans (ILL) process will be made easier. Records can be displayed in any flavour of MARC CD-ROM databases from various vendors could be searched with a single interface. The SDI or selective dissemination of information service could be set to run a saved search in the catalogues of many different libraries regularly and automatically with results being sent to the user by fax or e-mail.
- 17. Disadvantages Very complex. Levels of services supported within and between the particular implementation depend on Z-client/Z-server and host library management system. The differences between the facilities on Z-client and Z-server lead to poor output. Multi-database searching leads to slow response time and information overload.
- 18. Z39.50: current & Future ZING is the umbrella name that has been given to the whole set of experiments going on that are attempting to look at what possible next generation versions of Z39.50. “ZING, "Z39.50-International: Next Generation", refers to a number of initiatives by Z39.50 implementors looking at evolving Z39.50 to a more mainstream protocol attractive to information providers, developers, vendors, and users. Currently, there are experiments going on under the general ZING umbrella One ZING experiment, begun in the summer of 2001, is called the Search/Retrieve Web Service (SRW). This approach uses standard web technologies including Extensible Mark-up Language (XML), Hypertext Transfer Protocol (HTTP), Simple Object Application Protocol (SOAP), and Web Service Description Language (WSDL) to create a lightweight information retrieval protocol that fits in the context of web services. SRW retains several key Z39.50 concepts such as abstract access points using Z39.50 attribute sets within a simple query structure called an experimental Common Query Language (CQL). ZOOM, the Z39.50 Object Oriented Model, is a separate ZING initiative. ZOOM is developing specifications for application programming interfaces (API) to build any kind of Z39.50 client or client-based service. It uses Perl, c++, java.
- 20. Conclusion Z39.50 is protocol that is used for information retrieval from various libraries, information centres, data centres, museums, and to locate exact information from and to retrieve for the particular users needs. The Z39.50 protocol not only rescues a librarian from learning different search interfaces for different databases, it also helps the librarian to improve resource sharing among libraries by virtual union catalogue and ILL.
- 22. References 1. NISO Press. (2015, May 7). ANSI/NISO Z39.50-2003 (S2014) Information Retrieval: Application Service Definition & Protocol Specification | NISO website. Niso.org. https://www.niso.org/publications/ansiniso-z3950-2003-s2014. Retrieved on 17th Dec. 2020 2. Protocols Z39.50 and libraries. (2015). Http://Eprints.Rclis.Org. http://eprints.rclis.org/8777/1/Z39.50_and_libraries.pdf retrieved on 18th Dec. 2020 3. Meon, W. E. (2018). Conference on Bibliographic Control in the New Millennium (Library of Congress). Loc.Gov. https://www.loc.gov/catdir/bibcontrol/moen_paper.html, Retrieved on 18th Jan. 2020. 4. Aruna, A. (2001). Z39.50: An information Retrieval Protocol. DESIDOC Bulletin of Information Technology, 21(6), 30–36. https://doi.org/10.14429/djlit.21.6.3548, Retrieved on 21st Jan. 2021. 5. Router-switch. (2020). types of network protocols. Www.Router-Switch.Com. https://www.router-switch.com/faq/types-of- network-protocols.html retrieved on 18th Dec. 2020