indexing.html
8.66 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
<!DOCTYPE html>
<!--
| Generated by Apache Maven Doxia Site Renderer 1.7.4 at 2017-05-22
| Rendered using Apache Maven Fluido Skin 1.5
-->
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta name="Date-Revision-yyyymmdd" content="20170522" />
<meta http-equiv="Content-Language" content="en" />
<title>Multi Tier Annotation Search – Indexing</title>
<link rel="stylesheet" href="./css/apache-maven-fluido-1.5.min.css" />
<link rel="stylesheet" href="./css/site.css" />
<link rel="stylesheet" href="./css/print.css" media="print" />
<script type="text/javascript" src="./js/apache-maven-fluido-1.5.min.js"></script>
</head>
<body class="topBarDisabled">
<div class="container-fluid">
<div id="banner">
<div class="pull-left">
<div id="bannerLeft">
<h2>MTAS</h2>
</div>
</div>
<div class="pull-right"> <a href="http://www.meertens.knaw.nl/" id="bannerRight">
<img src="images/meertens.png" alt="Meertens Instituut" width="93" height="104"/>
</a>
</div>
<div class="clear"><hr/></div>
</div>
<div id="breadcrumbs">
<ul class="breadcrumb">
<li id="projectVersion">Version: 6.5.1
<span class="divider">|</span>
</li>
<li class="">
<a href="index.html" title="Mtas">
Mtas</a>
<span class="divider">/</span>
</li>
<li class="active ">Indexing</li>
<li id="publishDate" class="pull-right">Last Published: 2017-05-22</li>
</ul>
</div>
<div class="row-fluid">
<div id="leftColumn" class="span2">
<div class="well sidebar-nav">
<ul class="nav nav-list">
<li class="nav-header">Mtas</li>
<li>
<a href="index.html" title="Introduction">
<span class="none"></span>
Introduction</a>
</li>
<li>
<a href="features.html" title="Features">
<span class="none"></span>
Features</a>
</li>
<li>
<a href="installation.html" title="Getting started">
<span class="icon-chevron-right"></span>
Getting started</a>
</li>
<li class="active">
<a href="#"><span class="icon-chevron-down"></span>Indexing</a>
<ul class="nav nav-list">
<li>
<a href="indexing_configuration.html" title="Configuration">
<span class="none"></span>
Configuration</a>
</li>
<li>
<a href="indexing_mapping.html" title="Mapping">
<span class="none"></span>
Mapping</a>
</li>
<li>
<a href="indexing_formats.html" title="Formats">
<span class="icon-chevron-down"></span>
Formats</a>
<ul class="nav nav-list">
<li>
<a href="indexing_formats_folia.html" title="FoLiA">
<span class="none"></span>
FoLiA</a>
</li>
<li>
<a href="indexing_formats_tei.html" title="TEI">
<span class="none"></span>
TEI</a>
</li>
<li>
<a href="indexing_formats_sketch.html" title="Sketch">
<span class="none"></span>
Sketch</a>
</li>
<li>
<a href="indexing_formats_crm.html" title="CRM">
<span class="none"></span>
CRM</a>
</li>
</ul>
</li>
</ul>
</li>
<li>
<a href="search.html" title="Search">
<span class="icon-chevron-right"></span>
Search</a>
</li>
<li>
<a href="download.html" title="Download">
<span class="none"></span>
Download</a>
</li>
<li class="nav-header">Project Documentation</li>
<li>
<a href="project-info.html" title="Project Information">
<span class="icon-chevron-right"></span>
Project Information</a>
</li>
<li>
<a href="project-reports.html" title="Project Reports">
<span class="icon-chevron-right"></span>
Project Reports</a>
</li>
</ul>
<hr />
<div id="poweredBy">
<div class="clear"></div>
<div class="clear"></div>
<div class="clear"></div>
<div class="clear"></div>
<a href="http://maven.apache.org/" title="Built by Maven" class="poweredBy">
<img class="builtBy" alt="Built by Maven" src="./images/logos/maven-feather.png" />
</a>
</div>
</div>
</div>
<div id="bodyColumn" class="span10" >
<h1>Indexing</h1>
<p>To the existing Lucene approach of creating and searching indexes we add annotation and structure by using prefixes to distinguish between text and the different annotations and we use the payload to encode this additional information. By implementing the additions to the indexing process as an extension of the default Lucene Codec, updating and deleting documents is still supported, just as merging and optimizing cores.</p>
<p><b>Configuration</b></p>
<p>The use of prefixes provides a direct solution to store and search for annotations on separate words within a text, and only an adjusted tokenizer is needed to offer the correct tokenstream to the indexer. To be able to store ranges of words (e.g. sentences, paragraphs, chapters), distinct sets of words (e.g. named entities), and hierarchical relations between all of these annotations or words, we encode additional information as an array of bytes and store it as payload. </p>
<p>Several parsers are available for different <a href="indexing_formats.html">formats</a>, and for each of these parsers extensive <a href="indexing_configuration.html">configuration</a> of the mapping can be provided. Furthermore, multiple document formats and/or mapping configurations can be used within the same core. </p>
</div>
</div>
</div>
<hr/>
<footer>
<div class="container-fluid">
<div class="row-fluid">
<p >Copyright © 2017
<a href="http://www.meertens.knaw.nl/">Meertens Institute</a>.
All rights reserved.
</p>
</div>
</div>
</footer>
</body>
</html>