Attributes (ref)
From Nemerle Homepage
The semantics of attributes is the same as in C#, except for the mutable attribute, meaning lack of readonly on fields.
<attributes> ::=
<attribute> ::=
'new'
| 'volatile'
| 'public'
| 'protected'
| 'internal'
| 'private'
| 'abstract'
| 'sealed'
| 'override'
| 'static'
| 'mutable'
| 'extern'
<custom_attribute> ::=
<attribute_target> ::=
'assembly'
| 'field'
| 'event'
| 'method'
| 'module'
| 'param'
| 'property'
| 'return'
| 'type'