Example of a web page which offers to add a new search plugin using the
"auto-discovery" technique. When viewing with the Firefox browser
version 3.0, the symbol of the currently selected search engine
(Google's G in the example) becomes bluish. The user can choose
to add the search engine offered by that page by clicking the small
triangle
OpenSearch is a collection of technologies that allow publishing of search results in a format suitable for syndication and aggregation. It is a way for websites and search engines to publish search results in a standard and accessible format.
OpenSearch was developed by Amazon.com subsidiary A9 and the first version, OpenSearch 1.0, was unveiled by Jeff Bezos at the O'Reilly Emerging Technology Conference
in March, 2005. Draft versions of OpenSearch 1.1 were released during
September and December 2005. The OpenSearch specification is licensed by
A9 under the Creative Commons Attribution-ShareAlike 2.5 License.[1]
OpenSearch Description files: XML files that identify and describe a search engine.
OpenSearch Query Syntax: describe where to retrieve the search results
OpenSearch RSS (in OpenSearch 1.0) or OpenSearch Response (in OpenSearch 1.1): format for providing open search results.
OpenSearch Aggregators: Sites that can display OpenSearch results.
OpenSearch "Auto-discovery" to signal the presence of a search
plugin link to the user and the link embedded in the header of HTML
pages
OpenSearch Description Documents list search result responses for the
given website/tool. Version 1.0 of the specification only allowed one
response, in RSS format; however, version 1.1 provides support for
multiple responses, which may be in any format. RSS and Atom are the only ones formally supported by OpenSearch aggregators, however other types, such as HTML are perfectly acceptable.
Reference to the OpenSearch Description Document must be made in the root file of the domain.[citation needed]
e.g. for xyz.com the reference to the OpenSearch Description should be placed in xyz.com/index.html
Thus one domain can have only one Open Search reference.
OpenSearch Description Document must be placed on a web server of the same domain.[2]
A selection of search engines and software that support OpenSearch
Mozilla Firefox 2
and above implement OpenSearch, as well as a subset named MozSearch.
MozSearch is not intended for web use, only for Firefox related
projects. Extended features from MozSearch are usable in an OpenSearch
file with an XML namespace prefix. Features specific to MozSearch include search suggestions, among others.[4][11]
OpenGrok
source code search and cross reference engine, allows to easily create
new search engines based on performed search and thus group various
projects (i.e. source code trees) so they can be searched at once.
SAP NetWeaverEnterprise Search 7.2 and above supports the OpenSearch standards for search client and search provider plus some SAP-specific extensions [13]
SeaMonkey internet suite 2.1 Beta and above supports OpenSearch plugins as the default for web search.[14]
Windows 7 and Microsoft Search Server
to let users federate searches to web services via a centralized
location. (Note that even if the Site does not support OpenSearch,
through a service on the "Find More Providers" page, one can add a
website with a search engine if "TEST" is searched and the URL of the
search page contains "TEST".)
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