| Name | Kind | Description | 
| b | operation | |
| baseType | operation | returns the type on which the class (in fact a typedef) is based | 
| behavior | operation | return the behavior, may be an activity or a state machine | 
| behavior | operation | return the behavior | 
| bouml | class | |
| buffer_in | attribute | |
| buffer_in_end | attribute | |
| buffer_in_size | attribute | |
| buffer_out | attribute | |
| buffer_out_size | attribute | |
| builtinIn | operation | returns the default operation 'in' parameter specification in case its type is specified in the first 'Generation settings' tab, else an empty string/null | 
| builtinInOut | operation | returns the default operation 'inout' parameter specification in case its type is specified in the first 'Generation settings' tab, else an empty string/null | 
| builtinOut | operation | returns the default operation 'out' parameter specification in case its type is specified in the first 'Generation settings' tab, else an empty string/null | 
| builtinReturn | operation | returns the default operation 'return' parameter specification in case its type is specified in the first 'Generation settings' tab, else an empty string/null | 
| bye | operation | must be called just before the disconnexion | 
| byeCmd | attribute |