Most libraries buy cataloging information from the largest database of records in the world (books, serials, cds, dvds, etc) called WorldCat. 47 million records. Cataloging comes from member libraries from around the world and is shared by all.
Many public libraries are making the WorldCat database available to patrons via remote access very often through another OCLC service called FirstSearch.
However their is a difference between niche searching, using "focused/targeted crawlers" and search engines that provide access to material that no search tool crawls (Invisible Web).
Examples:
http://www.Allmusic.Com
Nuclear Explosions Dbase
http://www.ausseis.gov.au/information/structure/ is d/database/nukexp_query.html
Finally, it could also be asked that even if this material was crawled would the lack of an interface and search capability tailored to that data (specific sorts, etc) make pulling that material out of massive dbase (Google, AV, Excite, etc.) effective.
Slashdot Mirror
The largest database of free, full-text books available online and searchable from the University of Pennsylvania.
The Online Books Page
http://digital.library.upenn.edu/books/
Most libraries buy cataloging information from the largest database of records in the world (books, serials, cds, dvds, etc) called WorldCat.
47 million records. Cataloging comes from member libraries from around the world and is shared by all.
Many public libraries are making the WorldCat database available to patrons via remote access
very often through another OCLC service called FirstSearch.
Info about WorldCat at
http://www.oclc.com/
cheers,
rubble (a librarian from d.c.)
However their is a difference between niche searching, using "focused/targeted crawlers" and search engines that provide access to material that no search tool crawls (Invisible Web).
/ is d/database/nukexp_query.html
Examples:
http://www.Allmusic.Com
Nuclear Explosions Dbase
http://www.ausseis.gov.au/information/structure
Finally, it could also be asked that even if this material was crawled would the lack of an interface and search capability tailored to that data (specific sorts, etc) make pulling that material out of massive dbase (Google, AV, Excite, etc.) effective.
The "invisible web" issue being discussed is one
that is gaining a great deal of energy as more
and more users, especially new and unsophisticated
web searchers learn that many of the general
search tools can not and do not make all that
the Internet offers easily, if not entirely
acceesible and/or retrievable.
Searchers after learning this fact must become
knowledgeable about "specialty tools" in the
area(s) that they need information in. This is
quite similar to finding the necessary specialty
reference book on the library shelf.
Below find the urls for a large and growing
collection of these tools, that many visitors use
as an acquisition tool to help in the selection
process.
Unlike similar "Invisible Web" resources, these
pages have a more academic/scholarly feel to them.
direct search-Main Page:
http://gwis2.circ.gwu.edu/~gprice/direct.htm
direct search-State (U.S.) Databases
http://gwis2.circ.gwu.edu/~gprice/state.htm
direct search-Searchable Bibliographies
http://gwis2.circ.gwu.edu/~gprice/bibs.htm
http://www.altavista.com/cgi-bin/query?pg=aq
You can find more info on the Invisible Web here:
The "invisible web" issue being discussed is one
that is gaining a great deal of energy as more
and more users, especially new and unsophisticated
web searchers learn that many of the general
search tools can not and do not make all that
the Internet offers easily, if not entirely
acceesible and/or retrievable.
Searchers after learning this fact must become
knowledgeable about "specialty tools" in the
area(s) that they need information in. This is
quite similar to finding the necessary specialty
reference book on the library shelf.
Below find the urls for a large and growing
collection of these tools, that many visitors use
as an acquisition tool to help in the selection
process.
Unlike similar "Invisible Web" resources, these
pages have a more academic/scholarly feel to them.
direct search-Main Page:
http://gwis2.circ.gwu.edu/~gprice/direct.htm
direct search-State (U.S.) Databases
http://gwis2.circ.gwu.edu/~gprice/state.htm
direct search-Searchable Bibliographies
http://gwis2.circ.gwu.edu/~gprice/bibs.htm
http://www.altavista.com/cgi-bin/query?pg=aq
You can find more info on the Invisible Web here: