Here is a list of all namespaces with brief descriptions:
[detail level 1234]
  acl | |
  grammar | |
| fipa | Foundation of Physical Intelligent Agents |
 acl | Agent Communication Language |
  bitefficient | |
| conversation | |
| default_state | |
| default_transition | |
| envelope | |
| grammar | |
| string | |
| message | |
| MessageField | |
| representation | |
| validation | |
| std |
