indexing_formats_sketch.html
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<!DOCTYPE html>
<!--
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<title>Multi Tier Annotation Search – Sketch Engine</title>
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<h2>MTAS</h2>
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<h1>Sketch Engine</h1>
<p>For indexing <a class="externalLink" href="https://www.sketchengine.co.uk/word-sketch-index-format/">Sketch Engine</a> resources, the <i>mtas.analysis.parser.MtasSketchParser</i> extending the <i>MtasBasicParser</i> is available; full examples of configuration files are provided on <a class="externalLink" href="https://github.com/meertensinstituut/mtas/tree/master/conf/parser/mtas">GitHub</a>.</p>
<div class="source">
<div class="source"><pre class="prettyprint"><!-- START CONFIGURATION MTAS PARSER -->
<parser name="mtas.analysis.parser.MtasSketchParser">
...
<!-- START MAPPINGS -->
<mappings>
...
</mapping>
<!-- END MAPPINGS --->
...
</parser>
<!-- END CONFIGURATION MTAS PARSER -->
</pre></div></div>
<p>The <a href="indexing_configuration.html#configuration">configuration file</a> defining the <a href="indexing_mapping.html">mapping</a> has some specific settings for the Sketch parser distinguishing several types of elements within the XML-based Sketch resource: </p>
<ul>
<li><a href="indexing_formats_sketch.html#word">words</a> : the basic tokenisation layer</li>
<li><a href="indexing_formats_sketch.html#wordAnnotation">wordAnnotations</a> : annotations occurring within a word</li>
<li><a href="indexing_formats_sketch.html#group">groups</a> : containing one or multiple words</li>
</ul>
<p>All these elements are defined inside the <i>mappings</i> part of the configuration file. The use and meaning of the different elements is illustrated and explained by some examples. </p>
<p><a name="word"></a><b>Words</b></p>
<p>All rows not consisting of a start or end tag in the Sketch resource are supposed to be a set of tab-separated values. Such a row is potentially to be interpreted as <i>word</i> with each value an associated <i>wordAnnotation</i>. In the parser configuration, conditions can be put on which potential items in the Sketch resource should really be interpreted as a <i>word</i>: </p>
<div class="source">
<div class="source"><pre class="prettyprint"><mapping type="word">
<condition>
<item type="ancestorGroupName" not="true" condition="field" />
</condition>
</mapping>
</pre></div></div>
<p>The example above excludes potential words that are contained within a <i>field</i> tag.</p>
<p><a name="word"></a><b>Word annotations</b></p>
<p>Each value in the set of tab separated values from a word is a potential <i>wordAnnotation</i>. A mapping on such a <i>wordAnnotation</i> can be defined by referring to the position of the value in the <i>word</i> definition.</p>
<div class="source">
<div class="source"><pre class="prettyprint"><mapping type="wordAnnotation" name="0">
<token type="string" offset="false" parent="false">
<pre>
<item type="string" value="t" />
</pre>
<post>
<item type="text" />
</post>
</token>
</mapping>
</pre></div></div>
<p>The example above will add a token based on the first <i>wordAnntotation</i> value from each <i>word</i>.</p>
<p><a name="group"></a><b>Groups</b></p>
<p>Rows containing start and end tags in the Sketch resource define potential groups. These groups must contain words, and mappings can be configured by referring to their name.</p>
<div class="source">
<div class="source"><pre class="prettyprint"><mapping type="group" name="s">
<token type="string" offset="false">
<pre>
<item type="name" />
</pre>
<post>
<item type="attribute" name="class" />
</post>
</token>
</mapping>
</pre></div></div>
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