Using nonaggressive stemmers

Nowadays, it's nice to have stemming algorithms (algorithms that will reduce words to their stem or root forms) in your application, which will allow you to find words such as cat and cats just by typing cat. However, let's imagine that you have a search engine that searches through contents of the books in a library. One of the requirements is changing the plural forms of the words from plural to singular; nothing less, nothing more. Can Solr do this? Yes, Solr can do this, and this recipe will show you how to do it.

How to do it...

1. First, let's start with a simple, two-field index (add the following section to your schema.xml file):

   <field name="id" type="string" indexed="true" stored="true" required="true" />
   <field name="description" type="text_light_stem" indexed="true" stored="true" />

2. Now, let's define the text_light_stem field type, which should look like this (add this to your schema.xml file):

   <fieldType name="text_light_stem" class="solr...