| Name | Description | Type | Package | Framework |
| AbstractFeedbackModel | Convenience abstract class that can be extended by custom FeedbackModels. | Class | com.ptc.core.util.feedback.common.impl | WindChill |
| DefaultFeedbackSpec | Default implementation of the FeedbackSpec interface found in com. | Class | com.ptc.core.util.feedback.common.impl | WindChill |