Apache Solr Reference Guide Covering Apache Solr 6.0

The EnumField type allows defining a field whose values are a closed set, and the sort order is pre-determined
but is not alphabetic nor numeric. Examples of this are severity lists, or risk definitions.
Defining an EnumField in schema.xml
The EnumField type definition is quite simple, as in this example defining field types for "priorityLevel" and
"riskLevel" enumerations:
Besides the name and the class, which are common to all field types, this type also takes two additional
parameters:
enumsConfig: the name of a configuration file that contains the list of field values and their
order that you wish to use with this field type. If a path to the file is not defined specified, the file should be
in the conf directory for the collection.
enumName: the name of the specific enumeration in the enumsConfig file to use for this type.
Defining the EnumField configuration file
The file named with the enumsConfig parameter can contain multiple enumeration value lists with different
names if there are multiple uses for enumerations in your Solr schema.
In this example, there are two value lists defined. Each list is between enum opening and closing tags:
Not Available
Low
Medium
High
Urgent
Unknown
Very Low
Low
Medium
High
Critical
Changing Values
You cannot change the order, or remove, existing values in an
You can however add new values to the end.
without reindexing.
Apache Solr Reference Guide 6.0
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