No you can't - the sheet tries to parse the Attribute on the left first, so it fails. Abilities are parsed first though, so: @{charsheet|info%{charsheet|stat}} will work, where stat is an Ability on the character sheet with a relevant string inside it. But you can't just put an Attribute reference inside the Ability, or you'll end up with exactly what you already tried. You can also use the prefix trick so the Attributes are filled out from left to right without finding an illegal @{ Attribute call.
