dao.survey.fields.id_svy          = Survey identifier
dao.survey.fields.id_head         = Heading identifier
dao.survey.fields.caption_head    = Heading caption
dao.survey.fields.title_svy       = Survey title
dao.survey.fields.option_svy      = Survey object
dao.survey.fields.response_svy    = Total response
dao.survey.fields.authuser_svy    = Logon user ?