+-----------------------+-------------------------------+-----------------------+
| Option existence | option[123].exists | 'true' |
+-----------------------+-------------------------------+-----------------------+
+ | Binary content of the | option[12].option[34].hex | '(content of the |
+ | sub-option | | sub-option)' |
+ +-----------------------+-------------------------------+-----------------------+
+ | Sub-Option existence | option[12].option[34].exists | 'true' |
+ +-----------------------+-------------------------------+-----------------------+
| Client class | member('foobar') | 'true' |
| membership | | |
+-----------------------+-------------------------------+-----------------------+