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What is the difference between Kind and Entity in Google App Engine datastore?
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Data objects in Datastore are known as entities. An entity has one or more named properties, each of which can have one or more values. Entities of the same kind do not need to have the same properties, and an entity's values for a given property do not all need to be of the same data type.
In Java, you create a new entity by constructing an instance of class Entity , supplying the entity's kind as an argument to the Entity() constructor. After populating the entity's properties if necessary, you save it to the datastore by passing it as an argument to the DatastoreService. put() method.
Attributes are properties of entities.
Datastore is a NoSQL document database built for automatic scaling, high performance, and ease of application development.
An Entity is an individual record that gets stored and retrieved from the datastore.
The Kind is the unique string identifier of the type of entity.
For example, "Joe" is an Entity with age=42, dob=10-12-2000, and Kind "Person".
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