indexfile.html

来自「数据结构词典（英文）」· HTML 代码 · 共 48 行

HTML
48 行
字号 
<!DOCTYPE HTML PUBLIC "-//IETF//DTD W3 HTML 2.0//EN">
<HTML lang="en-US">
<HEAD>
<TITLE>index file</TITLE>
<META name="description"
  content="Definition of index file,
	possibly with links to more information and implementations.">
<META name="keywords" content="index file">
</HEAD>
<BODY BGCOLOR="#FFFFFF">

<H1>index file</H1>
<P>
(data structure)

<P>
<strong>Definition:</strong>
A file which stores <a href="key.html" tppabs="http://hissa.nist.gov/dads/HTML/key.html"><em>keys</em></a> and an index into another file.  The index file may have additional structure, e.g., be a <a href="btree.html" tppabs="http://hissa.nist.gov/dads/HTML/btree.html"><em>B-tree</em></a>.
<P><strong>See also</strong>
<a href="invertedindx.html" tppabs="http://hissa.nist.gov/dads/HTML/invertedindx.html"><em>inverted index</em></a>.
<P><em>Note:
An index file is helpful if records are large: the keys and indices can be extracted, sorted, and the original file accessed faster than the original file could be rearranged into sorted order. Also if the file needs to be accessed by different keys at the same time, it cannot be sorted by all of them.  So a index file is maintained for each different key.</em>
<P>Author: <a href="terms.html#authorPEB" tppabs="http://hissa.nist.gov/dads/terms.html#authorPEB">PEB</a>

<hr>

Go to the
<A HREF="terms.html" tppabs="http://hissa.nist.gov/dads/terms.html">Algorithms, Data Structures, and Problems</A>
home page.

<hr>

If you have suggestions, corrections, or comments, please get in touch
with
<a href="javascript:if(confirm('http://hissa.nist.gov/~black/black.html  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://hissa.nist.gov/~black/black.html'" tppabs="http://hissa.nist.gov/~black/black.html">Paul E. Black</a>
&nbsp;(<a href="mailto:paul.black@nist.gov">paul.black@nist.gov</a>).

<p>
Entry modified Wed Dec 15 09:18:45 1999.<BR>
HTML page formatted Wed Dec 22 09:35:34 1999.

<P>
This page's URL is
<A href="indexfile.html" tppabs="http://hissa.nist.gov/dads/HTML/indexfile.html">http://hissa.nist.gov/dads/HTML/indexfile.html</A>

</BODY>
</HTML>

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