Answer product-owner round 4: say a column reading a bound column of its own record is that column

README.md

@@ -449,9 +449,10 @@ order.id: datatype integer: {digits(3)} prints text, not an integer
 order.id: datatype integer: "1{digits(2)}" is not one value; write one literal or one {float()}, {int()}, {seq()} or {calc()}, or read one
 ```
 
-A column whose format is one read of another record's column and nothing else —
-`"score": "{/src.score}"`, or `"score": "{s.score}"` with `s` bound to `/src` — is that column: it takes the column's datatype and is null where the column is, and
-a struct field tagged `src.score` is nil there. A `datatype` of its own types the
+A column whose format is one read of a record's column and nothing else —
+`"score": "{/src.score}"`, `"score": "{s.score}"` with `s` bound to `/src`, or `"a": "{p}"`
+beside `{place as p}` in its own record — is that column: it takes the column's datatype and
+is null where the column is, and a struct field tagged `src.score` is nil there. A `datatype` of its own types the
 column's values where they prove it, and one restating the datatype it takes is refused.
 Any other read renders the column's text, a null as `""`.
 

docs/decisions.md

@@ -350,9 +350,10 @@ value, a range check is one comparison, and `1{digits(2)}` is a second spelling
 
 2026-09-15, Lilleman auf Larv.
 
-`{/src.score}` renders exactly what `src.score` draws, and so does `{s.score}` where `s` is
-bound to `/src`, so it takes that column's datatype and null rather than restating them, and a `datatype` restating the one it
-takes is a second spelling. Any other `datatype` still types the values — the one way to
+`{/src.score}` renders exactly what `src.score` draws, and so do `{s.score}` where `s` is
+bound to `/src` and `{p}` where `p` is bound to the column `place` of its own record, so it
+takes that column's datatype and null rather than restating them, and a `datatype`
+restating the one it takes is a second spelling. Any other `datatype` still types the values — the one way to
 type a column someone else wrote.
 
 ## A typed column's calc is refused unless proven