A multi-type entity (MTE) is one entity that is defined using multiple schema.org types (though usually not more than two). Creating a multi-type data item allows you to utilize all the properties available to both types. You may want to create a multi-type entity for your business if, for example, you’re using the Physician LocalBusiness type and want to add alumni information that’s only available to the Person type. To resolve this, your local business would be typed as both Physician and Person.