Consists of a scheme $X$, satisfying the following properties:
$X$ cohen-macaulay, affine, regular, connected, all stalks of the structure sheaf are domains, pure dimension 1, locally noetherian, noetherian, irreducible, dimension 1, excellent, integral, reduced
By the theorems, we also have {"X": {"quasi-compact": true, "separated": true, "quasi-separated": true}}