|_<nonReservedName> |Suppress output. Column names with leading underscore are used to select data from the database and make it available in other parts of the report without generating any output. |
|_formJson[Base64] |System internal. Return form with given id as json string (`SELECT '<formId>' AS _formJson`). `_formJsonBase64` returns the json string encoded in base 64. |
|_formJson |System internal. Return form with given id as json string. (`SELECT 'fid:<formId>[\|reduce][\|b64]' AS _formJson`). |
| |Flag `reduce` filters out 'modified', 'created' as well as keys which hold default values. |
| |Flag `b64` encodes the json string in base 64. |