The Solr schema

The Solr schema mostly consists of fields and field types. It defines the fields that are to be stored in the Solr index and the processing that should happen on data being indexed or searched in those fields. Internally, the schema is used to assign properties to the fields used for creating a document that is to be indexed using the Lucene API. The default schema available with Solr can be located in <solr_home>/example/solr/collection1/conf/schema.xml. Here, collection1 is the name of the core.

Note

A Solr server can have multiple cores and each core can have its own schema.

Let us open up the schema.xml file and go through it. In the XML file, we can see that there is a section for fields inside which there are multiple fields. Also, there is another section for types. The types section contains different entries of fieldType, which define the type of field in terms of how the field will be processed during indexing and during query. Let us understand how to create...