| Name | Description | Type | Package | Framework |
| AbstractComponentEventLink | Base class for link-generating components that are based on a component event request. | Class | org.apache.tapestry5.corelib.base | Apache Tapestry |
| AbstractConditional | Base class for If and Unless. | Class | org.apache.tapestry5.corelib.base | Apache Tapestry |
| AbstractField | Provides initialization of the clientId and elementName properties. | Class | org.apache.tapestry5.corelib.base | Apache Tapestry |
| AbstractLink | Provides base utilities for classes that generate clickable links. | Class | org.apache.tapestry5.corelib.base | Apache Tapestry |
| AbstractPropertyOutput | Base class for components that output a property value using a PropertyModel. | Class | org.apache.tapestry5.corelib.base | Apache Tapestry |
| AbstractTextField | Abstract class for a variety of components that render some variation of a text field. | Class | org.apache.tapestry5.corelib.base | Apache Tapestry |
| BaseMessages | Class | org.apache.tapestry5.corelib.base | Apache Tapestry | |