| Name | Description | Type | Package | Framework |
| CasData | Interface for directly accessing and manipulating the data in the Common Analysis Structure. | Interface | org.apache.uima.cas_data | Apache Uima |
| FeatureStructure | An object in the CAS. | Interface | org.apache.uima.cas_data | Apache Uima |
| FeatureValue | The base interface for the value of a feature. | Interface | org.apache.uima.cas_data | Apache Uima |
| PrimitiveArrayFS | Interface | org.apache.uima.cas_data | Apache Uima | |
| PrimitiveValue | Represents a primitive feature value - a string, integer, or float. | Interface | org.apache.uima.cas_data | Apache Uima |
| ReferenceArrayFS | Interface | org.apache.uima.cas_data | Apache Uima | |
| ReferenceValue | A FeatureValue that represents a reference, via ID, to another FeatureStructure. | Interface | org.apache.uima.cas_data | Apache Uima |