source: trunk/gsdl/macros/mg.dm@ 1049

Last change on this file since 1049 was 1049, checked in by nzdl, 24 years ago

* empty log message *

  • Property svn:executable set to *
  • Property svn:keywords set to Author Date Id Revision
File size: 4.4 KB
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1package mg
2
3#######################################################################
4# java images/scripts
5#######################################################################
6
7# the _javalinks_ macros are the flashy image links at the top right of
8# the page.
9
10_javalinks_ {_imagehome_}
11_javalinks_ [v=1] {
12_imagehome_<br>
13}
14
15
16#######################################################################
17# icons
18#######################################################################
19
20_iconhmg_ {<img src="_httpiconhmg_" width=_widthhmg_ height=_heighthmg_}
21
22#######################################################################
23# http macros
24#
25# These contain the url without any quotes
26#######################################################################
27
28_httpiconhmg_ {_httpimg_/h\_mg.gif}
29_widthhmg_ {200}
30_heighthmg_ {57}
31
32
33#######################################################################
34# page content
35#######################################################################
36
37_pagetitle_ {NZDL: MG}
38
39_imagethispage_ {_iconhmg_}
40
41_content_ {
42_iconblankbar_
43
44<p><i>MG</i> is a freely-available full-text retrieval system that
45makes efficient use of disk resources by storing the index, and the
46text that is indexed, in compressed form. The <i>MG</i> system is
47described in the eponymous book
48<a href="http://www.cs.mu.oz.au/mg/"><i>Managing
49Gigabytes</i></a>. To meet
50the needs of The New Zealand Digital Library we have made a number
51of improvements to the standard <i>MG</i> distribution. These
52improvements are being made available as <i>MG-1.3</i>.
53
54<p><i>MG-1.3</i> offers:
55
56<dl>
57
58<dt><b>Flexible stemming methods</b>
59<dd>Different stemming methods can be used in the same collection. In the
60original version a collection could only use a single stemming method, now
61all four combinations of stemming and casefolding can be used in queries.
62This can be applied to whole queries as well as individual words.
63
64<dt><b>Weighting terms</b>
65<dd>Weightings can be applied to individual terms in a ranked query. This
66allows a user to influence the order that documents are returned with
67documents with the higher rated words nearer the top.
68
69<dt><b>Term frequencies</b>
70<dd>The number of times each query term appears in the collection can be
71displayed during a query.
72
73<dt><b>Decompression of text</b>
74<dd>A small program is included in the distribution which allows you to
75decompress all the text with the document and paragraph breaks inserted
76at all the right places. With minimal programming you could then rebuild
77the collection from the compressed text.
78
79<dt><b>Merging of level 3 indexes</b>
80<dd>In the original version merging indexes was only implemented for
81level 2 indexes. We have extended this to also include level 3 indexes.
82
83<dt><b>Machine independant indexes</b>
84<dd>The indexes are now always written using network byte ordering, which
85is big endian. This means that indexes built on little endian machines can
86be used on big endian machines providing the two machines have data types
87the same length and use the same floating point formats.
88
89<dt><b>Port to MSDOS</b>
90<dd>A port of <i>MG</i> to MSDOS with 32 bit processing has also been
91incorporated into the distribution. This port allows <i>MG</i> to be
92compiled on Windows95 and WindowsNT.
93
94</dl>
95<br>
96
97<h3>Installing MG-1.3</h3>
98
99Installing <i>MG-1.3</i> on unix systems is the same as the standard
100distribution.
101
102<ul>
103
104<li>Download the <a href="http://www.nzdl.org/download/mg/mg-1.3f.tar.gz"><i>MG-1.3f</i></a>
105distribution.
106<li>Change your current working directory to where the distribution was unpacked and
107type &quot;<tt>./configure --prefix=`pwd`;</tt>&quot;. When the configure script has finished
108running type &quot;<tt>make</tt>&quot; and then &quot;<tt>make install</tt>&quot;.
109<li>Test the installation by typing &quot;<tt>make check</tt>&quot;.
110
111</ul>
112
113If you have trouble during installation procedure see the INSTALL instructions
114included with the distribution.
115
116<p>Installing <i>MG-1.3f</i> on 32-bit MSDOS operating systems currently consists of
117typing &quot;nmake win32.mak&quot; in both the lib and src&\#092;text directories.
118The makefiles may need some work depending on your compiler.
119
120<p><br>
121
122<h3>Bugs</h3>
123
124<p>Please report problems specific to <i>MG-1.3</i> to the <a
125href="mailto:[email protected]">New Zealand Digital Library
126administrator</a>. For general problems mail the
127<a href="http://www.cs.mu.oz.au/mg/"><i>MG</i>
128mailing list</a> which services a community of experienced <i>MG</i>
129users.
130}
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