This is the registry for the four namespaces defined by the Activity Streams specifications.
For convenience this registry includes a short human-readable description of each item. However, these descriptions are not normative; consult the corresponding specification for the normative definition of each item
| Verbs | Registry of verb keywords |
| Object Types | Registry of object type keywords |
| Activity Components | Registry of activity components and their JSON property names |
| Object Components | Registry of object components and their JSON property names |
| Specifications | Index of specifications included in this registry |