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无论是英文还是中文,页面内容中都会有一些出现频率很高,却对内容没有任何影
响的词,如“的”、“地”、“得”之类的助词,“啊”、“哈”、“呀”之类的
感叹词,“从而”、“以”、“却”之类的副词或介词。这些词被称为停止词,因
为它
们对页面的主要意思没什么影响。英文中的常见停止词有
the
,
a
,
an
,
to
,
of
等
。为节省存储空间和提高搜索效率,搜索引擎在索引页面或处理搜索请求时
会自动忽略某
些字或词,这些字或词即被称为
Stop Words(
停用词
)
。文档中如果
大量使用停用词容易对
页面中的有效信息造成噪音干扰,所以搜索引擎在运算之前
都要对所索引的信息进行消除
噪音的处理。
搜索引擎停用词常见有以下两类:
1
、这些词应用十分广泛,在
< br>Internet
上随处可见,比如“Web”一词几乎
在每个网站上均会出现,对这样的词搜索引擎无
法保证能够给
出真正相关的搜索
结果,难以帮助缩小搜索范围,同时还会降低搜索的效率;
2
、这类就更多了,包括了语气
助词、副词、介词、连接词等,通常自身
并无明确的意义,只
有将其放入一个完整的句子中才有一定作用,如常见的
“的”、“在”之类。
举个例子来说,象“IT
技术”,虽
然其中的“IT”从我们的本意上是指
“Information Technolog
y”,事实上这种缩写也能够为大多数人接受,但对搜索
引擎来说,此“IT”不过是“
it”,即“它”的意思,这在英文中是一个极其常见
同时意
思又相当含混的词,在大多数情况下将被忽略。我们在
IT
技术
点评中保留
“IT”更多地面向“人”而非搜索引擎,以求用户能明了
< br>IT
技术点评网站涉及的
内容限于信息技术,虽然从
p>
SEO
的角度这未必是最佳的处理方式。
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