1.16.4.2.3. Conditional Index Rules

You may also add a condition to the index rule and have multiple rules with the same nodeType. The first index rule that matches will apply and all remain ones are ignored:


<?xml version="1.0"?>

<!DOCTYPE configuration SYSTEM "http://www.exoplatform.org/dtd/indexing-configuration-1.0.dtd">

<configuration xmlns:nt="http://www.jcp.org/jcr/nt/1.0">

  <index-rule nodeType="nt:unstructured"

              boost="2.0"

              condition="@priority = 'high'">

    <property>Text</property>

  </index-rule>

  <index-rule nodeType="nt:unstructured">

    <property>Text</property>

  </index-rule>

</configuration>

In the above example, the first rule only applies if the nt:unstructured node has a priority property with a value 'high'. The condition syntax supports only the equals operator and a string literal.

You may also refer properties in the condition that are not on the current node:


<?xml version="1.0"?>

<!DOCTYPE configuration SYSTEM "http://www.exoplatform.org/dtd/indexing-configuration-1.0.dtd">

<configuration xmlns:nt="http://www.jcp.org/jcr/nt/1.0">

  <index-rule nodeType="nt:unstructured"

              boost="2.0"

              condition="ancestor::*/@priority = 'high'">

    <property>Text</property>

  </index-rule>

  <index-rule nodeType="nt:unstructured"

              boost="0.5"

              condition="parent::foo/@priority = 'low'">

    <property>Text</property>

  </index-rule>

  <index-rule nodeType="nt:unstructured"

              boost="1.5"

              condition="bar/@priority = 'medium'">

    <property>Text</property>

  </index-rule>

  <index-rule nodeType="nt:unstructured">

    <property>Text</property>

  </index-rule>

</configuration>

The indexing configuration also allows you to specify the type of a node in the condition. Please note however that the type match must be exact. It does not consider sub types of the specified node type.


<?xml version="1.0"?>

<!DOCTYPE configuration SYSTEM "http://www.exoplatform.org/dtd/indexing-configuration-1.0.dtd">

<configuration xmlns:nt="http://www.jcp.org/jcr/nt/1.0">

  <index-rule nodeType="nt:unstructured"

              boost="2.0"

              condition="element(*, nt:unstructured)/@priority = 'high'">

    <property>Text</property>

  </index-rule>

</configuration>