3,197
edits
Search Engines for Genealogical Research (view source)
Revision as of 20:45, 20 March 2011
, 20 March 2011no edit summary
No edit summary |
No edit summary |
||
| Line 4: | Line 4: | ||
A search engine 'crawls' or 'spiders' the web based on what is already there. If a new link is added to a website somewhere, and it is not already in the search engine's database of sites it searches, the search engine will go to that link and 'spider' it for its contents and add the page or entire site to its database, index its contents, and make that site's contents available for searching by way of the search engine. This can happen anywhere from once a month to daily depending upon how frequently that site is updated. | A search engine 'crawls' or 'spiders' the web based on what is already there. If a new link is added to a website somewhere, and it is not already in the search engine's database of sites it searches, the search engine will go to that link and 'spider' it for its contents and add the page or entire site to its database, index its contents, and make that site's contents available for searching by way of the search engine. This can happen anywhere from once a month to daily depending upon how frequently that site is updated. | ||
No two search engines contain the exact same database. Any one search engine may contain listings of sites that another search engine has missed. So if you do not find an ancestor in one search engine, try another, or better yet, try a compiled search engine, or 'metacrawler'. | |||
=== Major Search Engines === | === Major Search Engines === | ||