mi_variables
On a page, there are some system variables stored. These can be useful in several circumstances.
The most useful ones are:
| Variable | Explanation |
| mi_currentlang | The current language, typically "en", "dk", "fr" etc |
| mi_rspid | The respondent id (GUID) |
| mi_blid | BaselineId identifying the current questionnaire |
| mi_altid | The altid used in the link (if provided) |
| mi_sysrnd | The sys_random variable for this interview. A number between 0 and 1000 |
| mi_direction | Have the value of "1" if we arrived at the page by "Next" button, and "-1" if "Previous" button was pressed |