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Subject directories are built by human
hands instead of by “spider” programs scanning web pages. The results
are often sorted by subject instead of ranked by a computer. The
results given by a subject directory can be a great deal more relevant
to a given search, even though the database of searched web pages is
somewhat smaller than the average search engine. Also the searches
within subject directories search titles and headers but do not contain
the entire text of a page, limiting the chance that you will click on a
link only to find that the only reference to the search criteria is a
brief tangent.
There can be great advantages to
searches built by human minds instead of spider programs. Spiders are
very useful at gathering large quantities of information, however the
search capacity is limited to the text of the search and can often be
searched and ranked as a result out of context. A human can compile
categories based on a search that the computer might not see as
relevant. A human can make connections and leaps of logic to fit a
human searcher, whereas a computer follows strict logical protocol that
do not always fit some of the zany things that we humans are searching
for online.
Computer ranking algorithms are a
subject that I personally know nothing about. I do not know how they
are chosen, who programs them, or what their basis for calculation is.
I do know that if I am looking for something in particular online, I
often know at least a vague concept of what I am looking for. A search
result page grouped by category means that I can avoid subjects that are
not quite what I want and find pages similar to what I do want much more
easily. I know that when I search yahoo, there are often some random
results, or ones which fit my search criteria but are not of the correct
subject nature. That is bypassed in the subject directories.
I could not give enough examples of
times that I have searched and searched for a particular subject and
found infinite references to my specific phrase in irrelevant pages. A
person with a blog or a group on a message board might be discussing the
political situation in Iraq, but that does not mean that their page
holds any relevant information concerning that subject. I imagine that
searching a subject directory where the lack of the complete text of
each page limits results, would be a great deal easier than sifting
through the mountains of one-line references that happen to match the
search.
Subject directories
are not just useful because they allow you to search the internet, since
search engines perform the same function. Subject directories are
smaller, more specialized programs that allow you to hone in on a
particular subject or detail and study it among like information without
the worry of irrelevant searches coming of tangents in text pages. The
subject directories are human compiled, sorted into subjects instead of
rankings, and do not contain the full text of each page contained within
the search. These things all combine to make subject directories a
user-friendly internet search tool
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