Example for full-text indexing with the elasticsearch

[s0rin]

I am looking for an example of the ttl configuration file and indexer settings of a full-text indexing with the elasticsearch.
For long time ago I used useekm (with openrdf sesame 2.6.10) and I want to know if a similar configuration is supported by rdf4j (out of the box, not programmable).

[abrokenjester]

There's an example for a Lucene Sail on top of a memory store configuration here: https://github.com/eclipse/rdf4j/blob/main/core/repository/api/src/main/resources/org/eclipse/rdf4j/repository/config/memory-lucene.ttl . I don't think we have a ready made example of the Elasticsearch variant, to be honest - but the main different would be the value of sail:sailType, which in the case of Elasticsearch should be "openrdf:LuceneSail/Elasticsearch".

[s0rin]

Thank you for your answer and for the example, but it is still not clear how to set up the Elasticsearch indices.

Just for the reference, see below the old useekm configuration I used in the past:

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <!-- The id "repository" is mandatory! -->
    <bean id="repository" class="org.openrdf.repository.sail.SailRepository">
        <constructor-arg>
            <bean class="com.useekm.indexing.IndexingSail">
                <constructor-arg ref="sail" />
                <constructor-arg ref="indexerSettings" />
            </bean>
        </constructor-arg>
    </bean>

    <!-- This example uses the NativeStore as the underlying sail, you could also use the MemoryStore -->
    <!--  <bean id="sail" class="org.openrdf.sail.nativerdf.NativeStore" /> -->
    <bean id="sail" class="com.useekm.inference.SimpleTypeInferencingSail" >
         <constructor-arg>
               <bean class="org.openrdf.sail.nativerdf.NativeStore" />
          </constructor-arg>
    </bean>

    <!-- Indexer settings: -->
    <bean id="elasticsearchNode" lazy-init="true" class="com.useekm.indexing.elasticsearch.NodeFactoryBean">
        <property name="config" value="file:/opt/openrdf-sesame-2.6.10/useekm/elasticsearch.yml"/>
    </bean>

    <bean id="elasticsearchClient" factory-bean="elasticsearchNode" factory-method="client" destroy-method="close"/>

    <bean id="indexerSettings" lazy-init="true" class="com.useekm.indexing.elasticsearch.ElasticSearchIndexerSettings">
        <constructor-arg ref="elasticsearchClient"/>
        <property name="indexConfigurations">
            <list>
                <!-- Main class: DifferentiatedPerson -->
                <bean class="com.useekm.indexing.elasticsearch.IndexConfiguration">
                    <property name="name" value="DifferentiatedPerson"/>
                    <property name="matchType" value="http://d-nb.info/standards/elementset/gnd#DifferentiatedPerson"/>
                    <property name="properties">
                        <list>
                            <bean class="com.useekm.indexing.elasticsearch.IndexConfiguration$PropertyConfig">
                                <property name="name" value="prefNameDiffPerson"/>
                                <property name="predicate" value="http://d-nb.info/standards/elementset/gnd#preferredNameForThePerson"/>
                                <property name="mapping" value="Text"/>
                                <property name="multivalue" value="false"/>
                            </bean>
                            <bean class="com.useekm.indexing.elasticsearch.IndexConfiguration$PropertyConfig">
                                <property name="name" value="varNameDiffPerson"/>
                                <property name="predicate" value="http://d-nb.info/standards/elementset/gnd#variantNameForThePerson"/>
                                <property name="mapping" value="Text"/>
                                <property name="multivalue" value="true"/>
                            </bean>
                        </list>
                    </property>
                </bean>
              ...
            </list>
        </property>
    </bean>
</beans>