(dataserver_attribute)=
# The {{ tattr }} class

The {{tattr}} class (as its inherited classes, some of which are discussed here as well), 
is also a crucial part of any analysis performed through {{uranie}}. It describes any variable 
(input, output, or internal variable such as iterator) that are passed to the other modules. 
It does not really contain the data, but it has the statistical information (in case methods such 
as `computeStatistic` or `computeQuantile` have been called, see [](#dataserver_statistics)

```{toctree}
attribute/nature_attribute
attribute/variable_information
attribute/examples_use_attribute
attribute/adding_attribute_when_data_available
attribute/introducing_tstochastic_attribute
```