# Rougail > **🛈 Informations** > > **Path**: rougail\ > `standard` | Variable | Description | |----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------| | **rougail.var**
[`string`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `multiple` `standard` `mandatory` `unique` | A variable.
**Default**:
• a | # Extra > **🛈 Informations** > > **Path**: extra\ > `basic` ## dyn_*a* > **🛈 Informations** > > This family builds families dynamically.\ > **Path**: extra.dyn_*a*\ > `basic`\ > **Identifiers**: the value of the variable "[A variable](#rougail.var)" | Variable | |-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | **extra.dyn_*a*.var**
[`string`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `basic` `mandatory` |