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<title>Introduction of Hyper Estraier Version 1</title>
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<h1>Introduction</h1>

<div class="note">Copyright (C) 2004-2005 Mikio Hirabayashi</div>
<div class="note">Last Update: Tue, 07 Jun 2005 06:17:00 +0900</div>
<div class="navi">[<a href="intro-ja.html" hreflang="ja">Japanese</a>] [<a href="index.html">HOME</a>]</div>

<hr />

<h2 id="tableofcontents">Table of Contents</h2>

<ol>
<li><a href="#introduction">Introduction</a></li>
<li><a href="#installation">Installation</a></li>
<li><a href="#deployment">Deployment</a></li>
<li><a href="#complement">Complement</a></li>
</ol>

<hr />

<h2 id="introduction">Introduction</h2>

<p>Hyper Estraier is a full-text search system.  You can search lots of documents for some documents including specified words.  If you run a web site, it is useful as your own search engine for pages in your site.  Also, it is useful as search utilities of mail boxes and file servers.</p>

<p>The characteristic of Hyper Estraier is the following.</p>

<ul>
<li>High performance of search</li>
<li>High scalability of target documents</li>
<li>Perfect recall ratio by N-gram method</li>
<li>Phrase search, attribute search, and similarity search</li>
<li>Multilingualism with Unicode</li>
<li>Independent of file format and repository</li>
<li>Simple and powerful API</li>
<li>Supporting P2P architecture</li>
</ul>

<p>To begin with, please try <a href="http://rbbs.sourceforge.jp/cgi-bin/estdemo-en/estseek.cgi">the demonstration site of Hyper Estraier</a> so that you will grasp overview of Hyper Estraier.</p>

<p>Hyper Estraier has two aspects.  One is as a library to construct a full-text search system.  That is, API (application programming interface) is provided for programmers.  It enables for you to embed advanced functions of full-text search into your applications.</p>

<p>The other is as an application of the API described above.  A command and a CGI script are provided.  Using them, you can construct a typical full-text search system without any programming.</p>

<p>This document describes how to construct a full-text search system with the command and the CGI script, seeing a subject matter of a search system of a web site.  Let's start with learning of the command and then step to the API.</p>

<hr />

<h2 id="installation">Installation</h2>

<p>This section describes how to install Hyper Estraier with the source package.  As for a binary package, see its installation manual.</p>

<h3>Preparation</h3>

<p>Hyper Estraier is available on UNIX-like systems and Windows NT series.  At least, the following environment are supported.</p>

<ul>
<li>Linux 2.2 and later (IA32/IA64/AMD64/SPARC/Alpha)</li>
<li>FreeBSD 4.9 and later (IA32/Alpha)</li>
<li>Solaris 8 and later (IA32/SPARC)</li>
<li>Mac OS X 10.2 and later (PowerPC)</li>
<li>HP-UX 11.11 and later (IA64/PA-RISC)</li>
<li>Windows 2000 and later (IA32)</li>
</ul>

<p>`gcc' 2.95 or later and `make' are required to install Hyper Estraier with the source package.  They are installed by default on Linux, FreeBSD and so on.</p>

<p>As Hyper Estraier depends on the following libraries, install them beforehand.</p>

<ul>
<li><a href="http://www.gnu.org/software/libiconv/">libiconv</a> : for conversion of character encodings.  1.9.1 or later is suggested.</li>
<li><a href="http://www.gzip.org/zlib/">zlib</a> : for loss-less data compression.  1.2.1 or later is suggested.</li>
<li><a href="http://qdbm.sourceforge.net">QDBM</a> : for embedded database.  1.8.27 or later is required.</li>
</ul>

<p>As well, it is suggested to build QDBM with enabling zlib (--enable-zlib) so that the index of Hyper Estraier becomes smaller.  Note that QDBM 1.8.26 or earlier is not supported.</p>

<h3>Installation</h3>

<p>When an archive file of Hyper Estraier is extracted, change the current working directory to the generated directory and perform installation.</p>

<p>Run the configuration script.</p>

<pre>./configure
</pre>

<p>Build programs.</p>

<pre>make
</pre>

<p>Perform self-diagnostic test.</p>

<pre>make check
</pre>

<p>Install programs.  This operation must be carried out by the root user.</p>

<pre>make install
</pre>

<h3>Result</h3>

<p>When a series of work finishes, the following files will be installed.</p>

<pre>/usr/local/include/estraier.h
/usr/local/include/estmtdb.h
/usr/local/lib/libestraier.a
/usr/local/lib/libestraier.so.2.0.0
/usr/local/lib/libestraier.so.2
/usr/local/lib/libestraier.so
/usr/local/lib/pkgconfig/hyperestraier.pc
/usr/local/bin/estcmd
/usr/local/bin/estmttest
/usr/local/bin/estmaster
/usr/local/bin/estcall
/usr/local/bin/estload
/usr/local/bin/estconfig
/usr/local/libexec/estseek.cgi
/usr/local/share/hyperestraier/estseek.conf
/usr/local/share/hyperestraier/estseek.tmpl
/usr/local/share/hyperestraier/estseek.top
/usr/local/share/hyperestraier/estresult.dtd
/usr/local/share/hyperestraier/estraier.idl
/usr/local/share/hyperestraier/locale/...
/usr/local/share/hyperestraier/filter/...
/usr/local/share/hyperestraier/increm/...
/usr/local/share/hyperestraier/doc/...
</pre>

<h3>Mac OS X, HP-UX, and Windows</h3>

<p>On Mac OS X, perform `make mac' instead of `make', and `make check-mac' instead of `make check', and `make install-mac' instead of `make install'.  As well, `libqdbm.dylib' and so on are created instead of `libestraier.so' and so on.</p>

<p>On HP-UX, perform `make hpux' instead of `make', and `make check-hpux' instead of `make check', and `make install-hpux' instead of `make install'.  As well, `libqdbm.sl' is created instead of `libestraier.so' and so on.</p>

<p>On Windows, the Cygwin environment is required for building.  Moreover, MinGW versions of zlib, libiconv, QDBM, and Pthreads are required.  On that basis, perform `make win'.  No installation command is provided for Windows.</p>

<hr />

<h2 id="deployment">Deployment</h2>

<p>This section describes how to create an index, and deploy the CGI script.</p>

<h3>Administration Command</h3>

<p>A database called inverted index is used in order to search for documents quickly.  That is, you should make the index containing target documents before you search some of them.</p>

<p>estcmd is provided to administrate indexes.  estcmd handles each file on the file system of the local host, as each document.  estcmd can register documents to the index and remove them from the index.  Moreover, estcmd can gather documents under a directory and register them as a job lot.  Supported file formats are plain-text, HTML, and e-mail (MIME).</p>

<p>As other formats are also supported by using filters, the method is mentioned later.</p>

<h3>Indexing</h3>

<p>It is presupposed that you run a web site and its contents are under `/home/www/public_html'.  Then, let's register them into the index as `/home/www/casket'.</p>

<pre>cd /home/www
estcmd gather -sd casket /home/www/public_html
</pre>

<p>Files under `/home/www/public_html' are gathered and registerd into a new index named as `casket'.  That's all for indexing.</p>

<h3>Deployment of the CGI Script</h3>

<p>It is presupposed that the URL of a directory for CGI scripts is `http://www.estraier.ad.jp/cgi-bin/' and its local path is `/home/www/cgi-bin'.  Then, let's deploy requisite files into there.</p>

<pre>cd /home/www/cgi-bin/
cp /usr/local/libexec/estseek.cgi .
cp /usr/local/share/hyperestraier/estseek.* .
</pre>

<p>`/usr/local/libexec/estseek.cgi', `estseek.(conf|tmpl|top)' in `/usr/local/share/hyperestraier/' are copied into `/home/www/cgi-bin/'.  estseek.cgi is the CGI script.  estseek.conf is the configuration file.  estseek.tmpl is the template file.  estseek.top is for the message of the top page.</p>

<p>Open estseek.cgi with a text editor and modify it.  Most items are not needed to be modified, except for `indexname', `lprefix', and `gprefix'.  Do as the following.</p>

<pre>indexname: /home/www/casket
...
lprefix: file:///home/www/public_html/
gprefix: http://www.estraier.ad.jp/
...
</pre>

<p>`indexname' specifies the path of the index.  `lprefix' specifies the local path of the document root directory.  `gprefix' specifies the URL of the document root directory.</p>

<h3>Let's Try It</h3>

<p>All set?  Let's access the URL `http://www.estraier.ad.jp/cgi-bin/estseek.cgi' with your favorite web browser.  How to use is described on the page.</p>

<h3>Updating the Index</h3>

<p>When some documents in your site are modified or new documents are added, please update the index at regular intervals.  Though it is okay to delete the index and remake it, incremental registration is useful.</p>

<p>The `-sd' option added when indexing is to record modification time of each document.  And it is useful for incremental registration.  Let's perform the following command.</p>

<pre>cd /home/www
estcmd gather -cl -sd -cm casket /home/www/public_html
</pre>

<p>The option `-cm' is to ignore files which are not modified.  The option `-cl' is to clean up data of overwritten documents.</p>

<h3>Reflection of Deleted Documents</h3>

<p>If some documents in your site are deleted, please reflect them to the index.  Let's perform the following command.</p>

<pre>cd /home/www
estcmd purge -cl casket
</pre>

<p>All records in the index are scanned and records of deleted documents are removed.  The option `-cl' is to clean up data of overwritten documents.</p>

<h3>Optimization</h3>

<p>Iteration of `gather' and `purge' makes the index fat gradually.  Optimization is to eliminate the dispensable regions and keeps the index small.</p>

<pre>cd /home/www
estcmd optimize casket
</pre>

<p>If `gather' or `purge' is performed without the `-cl' option, records of deleted documents are not deleted though deletion marks was applied to them.  `optimize' is useful to delete such void regions.</p>

<h3>Automated Administratoin</h3>

<p>`cron' enables you to automate operations for administration.  Register the following script to `crontab'.</p>

<pre>/usr/local/bin/estcmd gather -cl -sd -cm /home/www/casket
/usr/local/bin/estcmd purge -cl /home/www/casket
</pre>

<h3>For more detail</h3>

<p>Detail information of the command and the CGI script is described in <a href="uguide-en.html">the user's guide</a>.  Moreover, for information of the API, see <a href="pguide-en.html">the programming guide</a>.</p>

<hr />

<h2 id="complement">Complement</h2>

<p>This section describes how to contact the author and the license of Hyper Estraier.</p>

<h3>Contact</h3>

<p>Hyper Estraier was written and is maintained by <a href="http://qdbm.sourceforge.net/mikio/">Mikio Hirabayashi</a>.  You can contact the author by e-mail to `mikio@users.sourceforge.net'.  However, as for topics which can be shared among other users, pleae send it to one of the mailing lists.  To join the mailing list, refer to `<a href="http://lists.sourceforge.net/lists/listinfo/hyperestraier-users">http://lists.sourceforge.net/lists/listinfo/hyperestraier-users</a>'.</p>

<h3>License</h3>

<p>Hyper Estraier is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License or any later version.</p>

<p>Hyper Estraier is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.</p>

<p>You should have received a copy of the GNU Lesser General Public License along with Hyper Estraier (See the file `COPYING'); if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.</p>

<hr />

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1	dpavlin	2	<?xml version="1.0" encoding="UTF-8"?>
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12			<meta name="keywords" content="Hyper Estraier, Estraier, full-text search, API" />
13			<meta name="description" content="Introduction of Hyper Estraier" />
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19			<title>Introduction of Hyper Estraier Version 1</title>
20			</head>
21
22			<body>
23
24			<h1>Introduction</h1>
25
26			<div class="note">Copyright (C) 2004-2005 Mikio Hirabayashi</div>
27			<div class="note">Last Update: Tue, 07 Jun 2005 06:17:00 +0900</div>
28			<div class="navi">[<a href="intro-ja.html" hreflang="ja">Japanese</a>] [<a href="index.html">HOME</a>]</div>
29
30			<hr />
31
32			<h2 id="tableofcontents">Table of Contents</h2>
33
34			<ol>
35			<li><a href="#introduction">Introduction</a></li>
36			<li><a href="#installation">Installation</a></li>
37			<li><a href="#deployment">Deployment</a></li>
38			<li><a href="#complement">Complement</a></li>
39			</ol>
40
41			<hr />
42
43			<h2 id="introduction">Introduction</h2>
44
45			<p>Hyper Estraier is a full-text search system. You can search lots of documents for some documents including specified words. If you run a web site, it is useful as your own search engine for pages in your site. Also, it is useful as search utilities of mail boxes and file servers.</p>
46
47			<p>The characteristic of Hyper Estraier is the following.</p>
48
49			<ul>
50			<li>High performance of search</li>
51			<li>High scalability of target documents</li>
52			<li>Perfect recall ratio by N-gram method</li>
53			<li>Phrase search, attribute search, and similarity search</li>
54			<li>Multilingualism with Unicode</li>
55			<li>Independent of file format and repository</li>
56			<li>Simple and powerful API</li>
57			<li>Supporting P2P architecture</li>
58			</ul>
59
60			<p>To begin with, please try <a href="http://rbbs.sourceforge.jp/cgi-bin/estdemo-en/estseek.cgi">the demonstration site of Hyper Estraier</a> so that you will grasp overview of Hyper Estraier.</p>
61
62			<p>Hyper Estraier has two aspects. One is as a library to construct a full-text search system. That is, API (application programming interface) is provided for programmers. It enables for you to embed advanced functions of full-text search into your applications.</p>
63
64			<p>The other is as an application of the API described above. A command and a CGI script are provided. Using them, you can construct a typical full-text search system without any programming.</p>
65
66			<p>This document describes how to construct a full-text search system with the command and the CGI script, seeing a subject matter of a search system of a web site. Let's start with learning of the command and then step to the API.</p>
67
68			<hr />
69
70			<h2 id="installation">Installation</h2>
71
72			<p>This section describes how to install Hyper Estraier with the source package. As for a binary package, see its installation manual.</p>
73
74			<h3>Preparation</h3>
75
76			<p>Hyper Estraier is available on UNIX-like systems and Windows NT series. At least, the following environment are supported.</p>
77
78			<ul>
79			<li>Linux 2.2 and later (IA32/IA64/AMD64/SPARC/Alpha)</li>
80			<li>FreeBSD 4.9 and later (IA32/Alpha)</li>
81			<li>Solaris 8 and later (IA32/SPARC)</li>
82			<li>Mac OS X 10.2 and later (PowerPC)</li>
83			<li>HP-UX 11.11 and later (IA64/PA-RISC)</li>
84			<li>Windows 2000 and later (IA32)</li>
85			</ul>
86
87			<p>`gcc' 2.95 or later and `make' are required to install Hyper Estraier with the source package. They are installed by default on Linux, FreeBSD and so on.</p>
88
89			<p>As Hyper Estraier depends on the following libraries, install them beforehand.</p>
90
91			<ul>
92			<li><a href="http://www.gnu.org/software/libiconv/">libiconv</a> : for conversion of character encodings. 1.9.1 or later is suggested.</li>
93			<li><a href="http://www.gzip.org/zlib/">zlib</a> : for loss-less data compression. 1.2.1 or later is suggested.</li>
94			<li><a href="http://qdbm.sourceforge.net">QDBM</a> : for embedded database. 1.8.27 or later is required.</li>
95			</ul>
96
97			<p>As well, it is suggested to build QDBM with enabling zlib (--enable-zlib) so that the index of Hyper Estraier becomes smaller. Note that QDBM 1.8.26 or earlier is not supported.</p>
98
99			<h3>Installation</h3>
100
101			<p>When an archive file of Hyper Estraier is extracted, change the current working directory to the generated directory and perform installation.</p>
102
103			<p>Run the configuration script.</p>
104
105			<pre>./configure
106			</pre>
107
108			<p>Build programs.</p>
109
110			<pre>make
111			</pre>
112
113			<p>Perform self-diagnostic test.</p>
114
115			<pre>make check
116			</pre>
117
118			<p>Install programs. This operation must be carried out by the root user.</p>
119
120			<pre>make install
121			</pre>
122
123			<h3>Result</h3>
124
125			<p>When a series of work finishes, the following files will be installed.</p>
126
127			<pre>/usr/local/include/estraier.h
128			/usr/local/include/estmtdb.h
129			/usr/local/lib/libestraier.a
130			/usr/local/lib/libestraier.so.2.0.0
131			/usr/local/lib/libestraier.so.2
132			/usr/local/lib/libestraier.so
133			/usr/local/lib/pkgconfig/hyperestraier.pc
134			/usr/local/bin/estcmd
135			/usr/local/bin/estmttest
136			/usr/local/bin/estmaster
137			/usr/local/bin/estcall
138			/usr/local/bin/estload
139			/usr/local/bin/estconfig
140			/usr/local/libexec/estseek.cgi
141			/usr/local/share/hyperestraier/estseek.conf
142			/usr/local/share/hyperestraier/estseek.tmpl
143			/usr/local/share/hyperestraier/estseek.top
144			/usr/local/share/hyperestraier/estresult.dtd
145			/usr/local/share/hyperestraier/estraier.idl
146			/usr/local/share/hyperestraier/locale/...
147			/usr/local/share/hyperestraier/filter/...
148			/usr/local/share/hyperestraier/increm/...
149			/usr/local/share/hyperestraier/doc/...
150			</pre>
151
152			<h3>Mac OS X, HP-UX, and Windows</h3>
153
154			<p>On Mac OS X, perform `make mac' instead of `make', and `make check-mac' instead of `make check', and `make install-mac' instead of `make install'. As well, `libqdbm.dylib' and so on are created instead of `libestraier.so' and so on.</p>
155
156			<p>On HP-UX, perform `make hpux' instead of `make', and `make check-hpux' instead of `make check', and `make install-hpux' instead of `make install'. As well, `libqdbm.sl' is created instead of `libestraier.so' and so on.</p>
157
158			<p>On Windows, the Cygwin environment is required for building. Moreover, MinGW versions of zlib, libiconv, QDBM, and Pthreads are required. On that basis, perform `make win'. No installation command is provided for Windows.</p>
159
160			<hr />
161
162			<h2 id="deployment">Deployment</h2>
163
164			<p>This section describes how to create an index, and deploy the CGI script.</p>
165
166			<h3>Administration Command</h3>
167
168			<p>A database called inverted index is used in order to search for documents quickly. That is, you should make the index containing target documents before you search some of them.</p>
169
170			<p>estcmd is provided to administrate indexes. estcmd handles each file on the file system of the local host, as each document. estcmd can register documents to the index and remove them from the index. Moreover, estcmd can gather documents under a directory and register them as a job lot. Supported file formats are plain-text, HTML, and e-mail (MIME).</p>
171
172			<p>As other formats are also supported by using filters, the method is mentioned later.</p>
173
174			<h3>Indexing</h3>
175
176			<p>It is presupposed that you run a web site and its contents are under `/home/www/public_html'. Then, let's register them into the index as `/home/www/casket'.</p>
177
178			<pre>cd /home/www
179			estcmd gather -sd casket /home/www/public_html
180			</pre>
181
182			<p>Files under `/home/www/public_html' are gathered and registerd into a new index named as `casket'. That's all for indexing.</p>
183
184			<h3>Deployment of the CGI Script</h3>
185
186			<p>It is presupposed that the URL of a directory for CGI scripts is `http://www.estraier.ad.jp/cgi-bin/' and its local path is `/home/www/cgi-bin'. Then, let's deploy requisite files into there.</p>
187
188			<pre>cd /home/www/cgi-bin/
189			cp /usr/local/libexec/estseek.cgi .
190			cp /usr/local/share/hyperestraier/estseek.* .
191			</pre>
192
193			<p>`/usr/local/libexec/estseek.cgi', `estseek.(conf\|tmpl\|top)' in `/usr/local/share/hyperestraier/' are copied into `/home/www/cgi-bin/'. estseek.cgi is the CGI script. estseek.conf is the configuration file. estseek.tmpl is the template file. estseek.top is for the message of the top page.</p>
194
195			<p>Open estseek.cgi with a text editor and modify it. Most items are not needed to be modified, except for `indexname', `lprefix', and `gprefix'. Do as the following.</p>
196
197			<pre>indexname: /home/www/casket
198			...
199			lprefix: file:///home/www/public_html/
200			gprefix: http://www.estraier.ad.jp/
201			...
202			</pre>
203
204			<p>`indexname' specifies the path of the index. `lprefix' specifies the local path of the document root directory. `gprefix' specifies the URL of the document root directory.</p>
205
206			<h3>Let's Try It</h3>
207
208			<p>All set? Let's access the URL `http://www.estraier.ad.jp/cgi-bin/estseek.cgi' with your favorite web browser. How to use is described on the page.</p>
209
210			<h3>Updating the Index</h3>
211
212			<p>When some documents in your site are modified or new documents are added, please update the index at regular intervals. Though it is okay to delete the index and remake it, incremental registration is useful.</p>
213
214			<p>The `-sd' option added when indexing is to record modification time of each document. And it is useful for incremental registration. Let's perform the following command.</p>
215
216			<pre>cd /home/www
217			estcmd gather -cl -sd -cm casket /home/www/public_html
218			</pre>
219
220			<p>The option `-cm' is to ignore files which are not modified. The option `-cl' is to clean up data of overwritten documents.</p>
221
222			<h3>Reflection of Deleted Documents</h3>
223
224			<p>If some documents in your site are deleted, please reflect them to the index. Let's perform the following command.</p>
225
226			<pre>cd /home/www
227			estcmd purge -cl casket
228			</pre>
229
230			<p>All records in the index are scanned and records of deleted documents are removed. The option `-cl' is to clean up data of overwritten documents.</p>
231
232			<h3>Optimization</h3>
233
234			<p>Iteration of `gather' and `purge' makes the index fat gradually. Optimization is to eliminate the dispensable regions and keeps the index small.</p>
235
236			<pre>cd /home/www
237			estcmd optimize casket
238			</pre>
239
240			<p>If `gather' or `purge' is performed without the `-cl' option, records of deleted documents are not deleted though deletion marks was applied to them. `optimize' is useful to delete such void regions.</p>
241
242			<h3>Automated Administratoin</h3>
243
244			<p>`cron' enables you to automate operations for administration. Register the following script to `crontab'.</p>
245
246			<pre>/usr/local/bin/estcmd gather -cl -sd -cm /home/www/casket
247			/usr/local/bin/estcmd purge -cl /home/www/casket
248			</pre>
249
250			<h3>For more detail</h3>
251
252	dpavlin	9	<p>Detail information of the command and the CGI script is described in <a href="uguide-en.html">the user's guide</a>. Moreover, for information of the API, see <a href="pguide-en.html">the programming guide</a>.</p>
253	dpavlin	2
254			<hr />
255
256			<h2 id="complement">Complement</h2>
257
258			<p>This section describes how to contact the author and the license of Hyper Estraier.</p>
259
260			<h3>Contact</h3>
261
262			<p>Hyper Estraier was written and is maintained by <a href="http://qdbm.sourceforge.net/mikio/">Mikio Hirabayashi</a>. You can contact the author by e-mail to `mikio@users.sourceforge.net'. However, as for topics which can be shared among other users, pleae send it to one of the mailing lists. To join the mailing list, refer to `<a href="http://lists.sourceforge.net/lists/listinfo/hyperestraier-users">http://lists.sourceforge.net/lists/listinfo/hyperestraier-users</a>'.</p>
263
264			<h3>License</h3>
265
266			<p>Hyper Estraier is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License or any later version.</p>
267
268			<p>Hyper Estraier is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.</p>
269
270			<p>You should have received a copy of the GNU Lesser General Public License along with Hyper Estraier (See the file `COPYING'); if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.</p>
271
272			<hr />
273
274			</body>
275
276			</html>
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