Here is a list of all enum values with links to the classes they belong to:

- body : FIX::Message
- bufcapacity : xml_buffered_writer
- bufcapacitybytes : xml_buffered_writer
- DEFAULT_SIZE : FIX::FieldMap
- group : FIX::message_order
- header : FIX::Message, FIX::message_order
- normal : FIX::message_order
- REQUIRED_FIELDS : FIX::Header, FIX::Trailer
- trailer : FIX::Message, FIX::message_order
- value : opt_false, opt_true