Document numeric data type restrictions.
@@ -1638,6 +1638,11 @@ example, `x.kgtk_lqstring_text` instead of `kgtk_lqstring_text(x)`.
| kgtk_quantity_low_tolerance(x) | Return the low tolerance component of a KGTK quantity literal as a float. |
| kgtk_quantity_high_tolerance(x) | Return the high tolerance component of a KGTK quantity literal as a float. |
+!!! note
+ Functions that return numeric values are restricted to 8-byte integers and 8-byte IEEE floats.
+ Values that fall outside those ranges will be mapped onto floats when allowed or clamped to
+ the respective data type boundary values.
+
#### Functions on KGTK geo coordinates
