Use of a varial table

Hello,
so as not to have too many links,
I would like to know as what tool I should use to create varial with name or tag.
For example I create identifialbe elements, like a point, a plan, a line, a volume, etc., to which I give a name, then I can then use its name to create new manipulations
Thank you
si posilbe with examples
Yann