Current tagpath with provider in a tag expression

Can we obtain the current tagpath with provider in a tag expression in order to pass it to a function called in a runscript

Do you mean reference the tag path to the tag the expression is setting the value for?

To my knowledge a tag expression can not reference itself.

Yes, I would like to obtain the current tag provider or the fulltagpath

From the manual:

When you are writing an expression for an expression Tag, you can only reference other Tag values.

There is no way to dynamically get the tag provider or tag path of the current tag.

If you make the tag part of a UDT you can do this easily.