Question about hole callout on slot : rSolidWorks

Question about hole callout on slot : rSolidWorks slot drawing callout 8020 T-slot nut Extrusion Drawing Aluminium, dimensional, angle, white png Speech balloon Callout graphics, quote box, speech Balloon, callout png slot demo pg soft mahjong 2 Does this drawing feature symbols dictated by current standards for local note callouts? What machining process is specified for the slot?

slot vip ph The standard omits the word SLOT from the callout, and states that the end radii are to be indicated but not dimensioned RE: slot call out