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The SET statement specifies PROPERTYNAME and RANKMETHOD options for the query.
PROPERTYNAME
You can associate a property with a friendly alias for the query by using the following syntax:
SET PROPERTYNAME <guid_format>
PROPID <property_id> | <property_name>
AS <column_alias> [<type_clause>]
RANKMETHOD
You can specify the rank method for queries with the ISABOUT term by using the following syntax:
SET RANKMETHOD <rankmethod>
The RANKMETHOD methods that can be specified by using the SET statement are JACCARD COEFFICIENT, DICE COEFFICIENT, and INNER PRODUCT.