Typically a software application which supports searching of a collection of semi-structured documents. These could be:

• on your local desktop (Zoot, [Six Degrees])

• on a server within your company Intra Net (VerIty, GooGle appliance)

• on a single public website (VerIty, used by Med Scape)

• with a Web Spider, one could host a Vertical Search Engine indexing a set collection of external web sites (this is a project I wish we'd gotten to at Med Scape).

• on a public search engine that indexes millions of websites (GooGle)

  • Altavista Vs Google

  • Jan'2007 - [Charles S Knight] list of 100 alternatives

There are some Open Source Search Engine-s

• LucEne for JaVa junkies (there's a [Py Lucene] package/wrapper)

• http://www.nwc.com/1120/1120f1side3.html

• [HtDig] - http://www.htdig.org/ (built in C++)

• [XapIan] is used by [Cite Base] http://www.xapian.org/

  • [Michael Salib] explained that Xapian was prefered to LucEne because It easier to wrap into Python and provided faster queries and a better precision.

• [M No Go Search] (was [Udm Search]) - http://search.mnogo.ru/

• some plans on building one in PyThon.

People use Search Engine Optimization/SEO services/practices to improve the ranking of their pages in public Search Engine-s.

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