Default value SQL expression (null if none).
OptionalDescriptionHuman-readable description for the column (emitted as sp_addextendedproperty).
Whether the column allows NULLs.
Max length for string columns (null if not applicable).
Precision for numeric columns (null if not applicable).
Scale for numeric columns (null if not applicable).
Name of the field in the source object.
Column name in the target table.
SQL type for the target platform (populated by TypeMapper).
User's customization of a single column.