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网络营销/电子商务词典：搜索引擎/互联网基础应用相关词汇（T）
【说明】：下列词汇为网上营销新观察通过多个网站的相关资源整理汇总，并未一一核对词汇内容的准确性，对词汇的解释不代表本站的观点，仅供初步参考，如需要严格考证词汇的意义，请参考互联网相关的专业词典。
taxonomy
A set of agreed-upon principles according to which information
can more logically be stored in an information retrieval
system. The term is used in science to describe the classification
of natural elements.
Teoma
www.teoma.com
A fairly new search engine (compared to oldies like AltaVista).
term frequency (TF)
A measure of how often a term is found in a collection of
documents. TF is combined with inverse document frequency
(IDF) as a means of determining which documents are most
relevant to a query. TF is sometimes also used to measure
how often a word appears in a specific document.
termination page
According to Chris Sherman's "New Web Map Reveals Previously
Unseen 'Bow Tie' Organizational Structure", termination
pages can be accessed via links from the core (heavily inter-linked
part of the Web) but do not link back into the core.
Source: http://www.infotoday.com/newsbreaks/nb000522-1.htm
For example, most businesses want their sites to be end
destinations and do not link to outside pages.
Also see origination page.
term vectors
In the classic vector-space retrieval model (Salton), documents
and queries are converted to term vectors to allow documents
to be matched to queries and ranked based on the number
of times the search terms occur in each document.
theme engine
A type of search engine that attempts to automatically classify
sites based on the keywords they contain.
thesaurus
Similar to a dictionary, but containing lists of synonyms
rather than definitions. Some search engines use a thesaurus
in addition to things like stemming and fuzzy matching in
an effort to improve recall.
throwaway domain
A domain where the name itself has little value to the owner.
Throwaway domains are typically used to experiment with.
It's common among search engine spammers to rigister throwaway
domains to experiment with things like cloaking. Unethical
SEO providers sometimes use throwaway domains to build link
popularity to a client's site. This can backfire though
as search engines are continually finding better ways to
combat spam. It's worth noting that Google specifically
warns against the use of throwaway domains. See their information
for webmasters for details.
title
The title of a page is displayed in the title bar right
at the top of the browser window. Almost all search engines
consider the title when determining a document's relevance
to a query and most search engines consider the title the
most important element. In the page, the title is specified
as an HTML element and placed in the header section of the
page. For a details on what spiders are looking for when
indexing pages and the varying importance of different elements,
please refer to the Search Engine Yearbook.
TLD
Top Level Domain. See domain.
toolbar
With reference to search engines, toolbars are browser add-ons
provided by the search engines. These toolbars often include
a search box, shortcuts to the different sections of the
search engine, additional page information etc.
top-level page
Some search engines call your default page (usually something
like index.html, index.htm, default.asp etc.) your top-level
page. When they say "submit only your top-level page",
it means that they probably have a spider that will find
the rest of your pages from there. It's always a good idea
to have a link from your top-level page to your sitemap.
traffic
Often used as a synonym for "visitors". The term
is used to describe activity on a web site - be it hits,
page views or unique visitors.
traffic-death redesign
This sudden and dramatic loss of traffic occurs when a web
site is re-designed and the page names all change. The result
is that aside from the main URL, none of the old pages exist
anymore, and anyone clicking on a search engine listing
gets a 404, or "page not found" error unless other
measures are taken.
T-Rex
The name of the Lycos spider.
Turbo10
www.turbo10.com
A meta search engine that searches both the surface-web
(normal documents) and the invisible web or, as they call
it, the DeepNet (documents not indexed by normal search
engines).
Type-less search engine
A search engine that perform searches via voice recognition,
clicks of a mouse or any means other than typing a keyword.
Example site: http://perfext.com
【说明】：上述词汇为网上营销新观察通过多个网站的相关资源整理汇总，并未一一核对词汇内容的准确性，对词汇的解释不代表本站的观点，仅供初步参考，如需要严格考证词汇的意义，请参考互联网相关的专业词典。
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