index - property index 

How to add a property index.

Synopsis

index('index_name').property('propertykey_name').by('meta-propertykey_name').add()

Description

A property index specifies an index that is built using the meta-property of a vertex property key in DSE Graph. A vertex label must be specified. The index name must be unique. The property key specified must have multiple cardinality.

Examples

Create an index byLocation index using the property key country and meta-property key of livedIn. The vertex label is specified as author.
schema().vertexLabel('author').index('byLocation').property('country').by('livedIn').add()