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                <h2>MTAS</h2>
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            <h1>Apache Solr</h1>
<p>Mtas can be used as plugin for Apache Solr</p>
<p><b>Prerequisites</b></p>

<ul>

<li>Installed <a class="externalLink" href="https://lucene.apache.org/solr/">Apache Solr</a></li>

<li>Currently supported and advised version is 7.1.0</li>
</ul>
<p>Start with a new Solr core.</p>
<p><b>Libraries</b></p>
<p>Add the <tt>mtas-7.1.0.1.jar</tt> to the <tt>lib</tt> directory of the new Solr core. A prebuilt <tt>mtas-7.1.0.1.jar</tt> is available from the <a href="download.html">download</a> page.</p>
<p>Furthermore, add the <a class="externalLink" href="http://commons.apache.org/proper/commons-math/">Apache Commons Mathematics Library</a> to the <tt>lib</tt> directory of the new Solr core.</p>
<p><b>Solrconfig.xml</b></p>
<p>Some changes have to be made within the <tt>solrconfig.xml</tt> file, elements have to be added to the <tt>&lt;config/&gt;</tt> or existing elements have te be adjusted:</p>
<p>Define a new <b>mtas searchComponent</b>: </p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;searchComponent name=&quot;mtas&quot; class=&quot;mtas.solr.handler.component.MtasSolrSearchComponent&quot;/&gt;
</pre></div></div>
<p>Add this component to the select requestHandler by inserting the following within the <tt>&lt;requestHandler/&gt;</tt> with name <tt>&quot;/select&quot;</tt>:</p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;arr name=&quot;last-components&quot;&gt;
  &lt;str&gt;mtas&lt;/str&gt;
&lt;/arr&gt;
</pre></div></div>
<p>Define a new <b>mtas_cql queryParser</b> and <b>mtas_join queryParser</b>:</p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;queryParser name=&quot;mtas_cql&quot; class=&quot;mtas.solr.search.MtasSolrCQLQParserPlugin&quot;/&gt;
&lt;queryParser name=&quot;mtas_join&quot; class=&quot;mtas.solr.search.MtasSolrJoinQParserPlugin&quot;/&gt;
</pre></div></div>
<p>Define a new <b>mtas requestHandler</b>:</p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;requestHandler name=&quot;/mtas&quot; class=&quot;mtas.solr.handler.MtasRequestHandler&quot; /&gt;
</pre></div></div>
<p>Define a new updateRequestProcessorChain:</p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;updateRequestProcessorChain name=&quot;mtasUpdateProcessor&quot;&gt;
  &lt;processor class=&quot;mtas.solr.update.processor.MtasUpdateRequestProcessorFactory&quot; /&gt;
  &lt;processor class=&quot;solr.LogUpdateProcessorFactory&quot; /&gt;
  &lt;processor class=&quot;solr.RunUpdateProcessorFactory&quot; /&gt;
&lt;/updateRequestProcessorChain&gt;
</pre></div></div>
<p>Define or adjust the update requestHandler with this updateRequestProcessorChain:</p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;requestHandler name=&quot;/update&quot; class=&quot;solr.UpdateRequestHandler&quot;&gt;
  &lt;lst name=&quot;defaults&quot;&gt;
    &lt;str name=&quot;update.chain&quot;&gt;mtasUpdateProcessor&lt;/str&gt;
  &lt;/lst&gt;
&lt;/requestHandler&gt;
</pre></div></div>
<p>Finally, in this instruction we will use a classic schema instead of the managed-schema. So the configuration must contain:</p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;schemaFactory class=&quot;ClassicIndexSchemaFactory&quot;/&gt;
</pre></div></div>
<p><b>Schema.xml</b></p>
<p>We extend a (classic) schema with one (or multiple) fields that may contain annotated text, e.g.</p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;field name=&quot;text&quot; type=&quot;mtas&quot; required=&quot;false&quot; multiValued=&quot;false&quot; indexed=&quot;true&quot; stored=&quot;true&quot; /&gt;
</pre></div></div>
<p>We define the referred Mtas fieldType by</p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;fieldType name=&quot;mtas&quot; class=&quot;solr.TextField&quot; postingsFormat=&quot;MtasCodec&quot;&gt;
  &lt;analyzer type=&quot;index&quot;&gt;
    &lt;charFilter class=&quot;mtas.analysis.util.MtasCharFilterFactory&quot; type=&quot;url&quot; prefix=&quot;http://localhost/demo/&quot; postfix=&quot;&quot; /&gt;
    &lt;tokenizer class=&quot;mtas.analysis.util.MtasTokenizerFactory&quot; configFile=&quot;folia.xml&quot; /&gt;
  &lt;/analyzer&gt;
  &lt;analyzer type=&quot;query&quot;&gt;
    &lt;tokenizer class=&quot;solr.WhitespaceTokenizerFactory&quot; /&gt;
    &lt;filter class=&quot;mtas.analysis.util.MtasPrefixTokenFilterFactory&quot; prefix=&quot;t&quot; /&gt;
  &lt;/analyzer&gt;
&lt;/fieldType&gt;
</pre></div></div>
<p>The charFilter with class <i>mtas.analysis.util.MtasCharFilterFactory</i> in the index analyzer contains an obligatory attribute <tt>type</tt> and two optional attributes <tt>prefix</tt> and <tt>postfix</tt>. The <i>type</i> can be <i>url</i> or <i>file</i>, referring to either an external url or a file on the filesystem. On indexing, the optional <i>prefix</i> and <i>postfix</i> attributes will be added to the provided value, resulting in a full url or location of a file. </p>
<p>The tokenizer with class <i>mtas.analysis.util.MtasTokenizerFactory</i> in the index analyzer has an attribute <tt>configFile</tt> containing the name of the required tokenizer configuration.</p>
<p>The filter in the query analyzer contains an obligatory attribute <tt>prefix</tt> defining the assumed prefix when this field will be queried directly within Solr.</p>
<p>See <a href="indexing_configuration.html">configuration</a> for more information about the definition of a tokenizer configuration.</p>
<p><b>Multiple tokenize configurations</b></p>
<p>If multiple tokenizer configurations are required, the Mtas fieldType has to be defined slightly different: </p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;fieldType name=&quot;mtas_config&quot; class=&quot;solr.TextField&quot; postingsFormat=&quot;MtasCodec&quot;&gt;
  &lt;analyzer type=&quot;index&quot;&gt;
    &lt;charFilter class=&quot;mtas.analysis.util.MtasCharFilterFactory&quot; config=&quot;mtas.xml&quot; /&gt;
    &lt;tokenizer class=&quot;mtas.analysis.util.MtasTokenizerFactory&quot; config=&quot;mtas.xml&quot; /&gt;
  &lt;/analyzer&gt;
&lt;/fieldType&gt;
&lt;fieldType name=&quot;mtas&quot; class=&quot;mtas.solr.schema.MtasPreAnalyzedField&quot;
  followIndexAnalyzer=&quot;mtas_config&quot; defaultConfiguration=&quot;default&quot;
  configurationFromField=&quot;type&quot; setNumberOfTokens=&quot;numberOfTokens&quot;
  setNumberOfPositions=&quot;numberOfPositions&quot; setSize=&quot;size&quot;
  setError=&quot;error&quot; setPrefix=&quot;prefixes&quot; postingsFormat=&quot;MtasCodec&quot;&gt;
  &lt;analyzer type=&quot;query&quot;&gt;
    &lt;tokenizer class=&quot;solr.WhitespaceTokenizerFactory&quot; /&gt;
    &lt;filter class=&quot;mtas.analysis.util.MtasPrefixTokenFilterFactory&quot; prefix=&quot;t&quot; /&gt;
  &lt;/analyzer&gt;
&lt;/fieldType&gt;
</pre></div></div>
<p>An additional fieldType (here named mtas_config) is defined, containing only an index analyzer. Both the charFilter and tokenizer within this analyzer have an attribute <tt>config</tt> referring to a Mtas configuration file. Depending on the required tokenizer configuration, for the charFilter this file will define <i>type</i>, <i>prefix</i> and <i>postfix</i> and for the tokenizer this file will define the <i>configFile</i>. An example of a Mtas configuration file is added below.</p>
<p>The Mtas fieldType is defined with class <i>mtas.solr.schema.MtasPreAnalyzedField</i>, an obligatory attribute <tt>followIndexAnalyzer</tt> referring to the additional fieldType we defined before. The optional attribute <tt>defaultConfiguration</tt> contains the name of the default configuration to be used, and the obligatory attribute <tt>configurationFromField</tt> contains the name of the field defining the required configuration. The optional attributes <tt>setNumberOfTokens</tt>, <tt>setNumberOfPositions</tt>, <tt>setSize</tt>, <tt>setPrefix</tt> and <tt>setError</tt> define fields that may be filled with respectively number of tokens, number of positions, filesize, prefixes and possible errors.</p>
<p><b>Example of a Mtas configuration file</b></p>

<div class="source">
<div class="source"><pre class="prettyprint">&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot; ?&gt;
&lt;mtas&gt;
  &lt;configurations type=&quot;mtas.analysis.util.MtasTokenizerFactory&quot;&gt;
    &lt;configuration name=&quot;folia&quot; file=&quot;folia.xml&quot; /&gt;
    &lt;configuration name=&quot;tei&quot; file=&quot;tei.xml&quot; /&gt;
  &lt;/configurations&gt;
  &lt;configurations type=&quot;mtas.analysis.util.MtasCharFilterFactory&quot;&gt;
    &lt;configuration name=&quot;folia&quot; type=&quot;url&quot; prefix=&quot;http://www.mycompany.com/archive/&quot; postfix=&quot;.xml&quot; /&gt;
    &lt;configuration name=&quot;tei&quot; type=&quot;file&quot; prefix=&quot;/storage/tei/&quot; postfix=&quot;&quot; /&gt;
  &lt;/configurations&gt;
&lt;/mtas&gt;
</pre></div></div>
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