[OR 2021 R1] Named Expression for separate X, Y and Z

So OpenRoads uses fallowing expression to get X Y and Z coordinates. And when used in text favorites you choose X or Y or Z or all together from a dropdown but it doesn't change the syntax from this.GetElement().Origin - My question is how do I specify a separate X and Y and Z for in this case a cell from an item types table excel macro. And for a mesh element is there a way to check first and last handle/ point origin/coordinates.