Consists of a scheme $X$, satisfying the following properties:

$X$ not all stalks of the structure sheaf are domains, affine, not regular, reduced, finite dimensional, quasi-compact, not integral, separated, pure dimension 1, locally noetherian, not irreducible, not all stalks of the structure sheaf are irreducible, not normal, dimension 1, connected, noetherian

By the theorems, we also have {"X": {"quasi-separated": true}}