What is Z39.50? Explain its features and implications for LICs.

Z39.50 OverView :

Z39.50 is an international standard client-server, application layer communications protocol developed and maintained by the Library of Congress. It allows users to search and retrieve information from databases over a TCP/IP computer network. The protocol is covered by ANSI/NISO standard Z39.50 and ISO standard 23950.

Features of Z39.50

1. Abstracted Syntax: The syntax of Z39.50 is abstracted from the underlying database structure. This means that users can formulate queries without knowing anything about the target database.
2. Variability in Results: Results for the same query can vary widely among different servers. This is because each server may have different ways of mapping the search to its indexes.
3. Interoperability: Z39.50 allows users in one system to search and retrieve information from other computer systems that have implemented Z39.50, without needing to know the search syntax used by those systems.
4. Extended Services: Z39.50-1995 introduced the Extended Services facility, which includes a new Z39.50 service used to initiate specific extended service tasks executed outside of the Z39.50 session.

Implications for LICs (Low-Income Countries)

Z39.50 has several implications for LICs:

1. Access to Information: Z39.50 enables LICs to access information from databases located in other countries or institutions that have implemented the protocol. This allows for greater access to a wider range of resources and knowledge.
2. Reduced Dependency: LICs can reduce their dependency on local resources by leveraging the capabilities of Z39.50 to access information from external sources. This can help overcome limitations in local collections and resources.
3. Cost-Effective: Z39.50 provides a cost-effective solution for LICs to access information. By utilizing existing infrastructure and networks, LICs can avoid the need for costly investments in building their own databases or systems.
4. Interoperability: The interoperability of Z39.50 allows LICs to collaborate and share information with other institutions and countries. This promotes knowledge exchange and cooperation in research and education.

In summary, Z39.50 is an international standard protocol that enables users to search and retrieve information from databases over a computer network. Its features include abstracted syntax, variability in results, and interoperability. For LICs, Z39.50 provides access to information, reduces dependency, is cost-effective, and promotes interoperability with other institutions and countries.