day 5: Meta Search Engine & Subject dirctories
Meta Search Engine & Subject directories
Meta Search Engine
is also known as metacrawlers or multi search engine.
It transmit search terms simultaneously to several search engine.
So, they do not have their own data of webpages.
Subject Directories
It contains information that is compiled by humans.
And thus there's own a small numbers, low millions, of pages in database.
It is also known as subject catalogs.
Normally, it's tropical lists arranged in hierarchical way.
So, users can select and browse a particular catagory.
No doubt, keywords searching are allowed!
This websites contains subject guides, reference work & also specialized datebase.
Do you know that subject gateways & virtual libraries are also Subject Directories?
Both of them are directories maintained by information specialists.
Materials are selected based on prefined criteria.
Examples of website for virtual libraries are
posted by TWZ @ 7:22 PM
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