OpenSearch and SRU: A Continuum of Searching.

Not all library content can be exposed as HTML pages for harvesting by search engines such as Google and Yahoo!. If a library instead exposes its content through a local search interface, that content can then be found by users of metasearch engines such as A9 and Vivísimo. The functionality provided by the local search engine will affect the functionality of the metasearch engine and the findability of the library's content. This paper describes that situation and some emerging standards in the metasearch arena that choose different balance points between functionality and ease of implementation. [ABSTRACT FROM AUTHOR]