In a custom shape (.shape file), I would like to define a property with
ext_attribute (<ext_attribute name="TEST" type="string" />)
and to display it on the custom shape created.
In the documentation, they spoke about "custom:<name>"
but I don't know how to use it in a text
(sth like <svg:text x="36.2" y="25.875">custom:<TEST></svg:text>).