| Block | This class represents a generic Block. |
| BlockContext | This class holds context information used for any Block interactions. |
| BlockFactory | This class manages the creation of Blocks. |
| BlockList | This class represents a list in a Block. |
| BlockListElement | This class represents a generic element of a List. |
| BlockProperty | This class represents a single Block property. |
| BlockPropertyAnnotation | This class represents a single annotation on a single property. |
| BlockPropertyAnnotationGroup | A BlockProperty can hold any number of annotations organized by group names. |
| BlockPropertyAnnotationGroups | This class holds a collections of annotation groups. |
| BlockRegistry | This class represents a collection of Blocks (likely parsed from an input library configuration file). |
| BlockTarget | This class represents the "target" of a Block path specification: a property, a list or a Block. |
| BlockTarget.PathInfo | This class provides additional information used in the resolution of a Block path specification. |
| ContentTypes | This class manages the information pertaining to a set of registered Content Types. |
| ContentTypes.ContentType | This class class defines a ContentType object. |
| DefaultBlockVisitor | A default implementation of the BlockVisitor interface. |
| BlockListElement.ListAction | This enumeration defines the types of actions that may be associated with a BlockListElement when it is added to a BlockList. |