Introduction
CQL
CQL (the Common Query Language,
http://www.loc.gov/cql/) is an abstract and extensible query language designed to provide maximum interoperability between systems, with minimal difficulty to learn and use, while still supporting complex search requirements.
SRW
SRW (http://www.loc.gov/z3950/agency/) stands for Search/Retrieve Web Service. It is a protocol intended to integrate access to various networked resources and promote interoperability between distributed databases by providing a common usage framework. SRW is a web-service-based protocol that combines more than 20 years of experience from the Z39.50 Information Retrieval protocol with modern web technologies.
SRW is SOAP-based.
SRU
SRU (Search/Retrieve via URL) is a standard search protocol for Internet search queries. It also utilizes CQL as its standard query syntax for representing queries.
SRU uses HTTP as its transport mechanism.
References
blog comments powered by Disqus