| Name | Kind | Description |
| ZeroToOneDoubleSimpleType | class | A data type for a double with positive value between 0.0 and 1.0. |
| ZeroToOneDoubleType | class | A data type to flag a zero to one association |
| class instance | A date and time with no offset from Coordinated Universal Time (UTC). | |
| ZuluDateTimeSimpleType | class | A data type for a datetime constrained to always be ZULU. |
| ZuluDateTimeType | class | A data type for a datetime constrained to always be ZULU. |