When the data that you want to analyze is modeled in terms of entities, links, and properties, you can create a schema with schema components. The example schemas that come with i2 Analyze can be edited if you do not want to start from a blank schema.
When you create a schema, it contains default system entity types. These components hold necessary information for the system and exist in order for it to work.
You can create schema components to classify and structure your data when it is stored in i2 Analyze. You can classify your data in terms of item types with their property types.