# Package org.apache.geode.cache.query.types

- Interface Summary
  Interface | Description
  --- | ---
  CollectionType | Represents the type of a collection, an object that can contain element objects.
  MapType | Represents the type of a Map, a collection that contains keys as well as values and maintains an association between key-value pairs.
  ObjectType | An ObjectType represents the type of an object in a query.
  StructType | Describes the field names and types for each field in a `Struct`.