TIP: You can make a string field mandatory by either enabling the mandatory option in the XFDL format option or setting required to true in an XForms bind.
提示：可以通过启用xfdl格式选项中的必填选项或在XForms绑定中将必要选项设置为true来使字符串字段成为必填字段。
If the constraint is not mandatory, you have the option of disabling it by clearing the checkbox and clicking OK.
如果这个限制不是强制的，您有权通过清除这个复选框和点击OK选择使它失效。
Not all these fields used in the various methods are mandatory, so your process must reflect which option you select.
并不是所有运用在各种方法中的字段都是强制性的，因此您的过程必须反映您选择的是哪个选项。
As far as I am concerned the use of stored procedures, database triggers and foreign key restraints is OPTIONAL, not MANDATORY, therefore I am free to exercise my option not to use them.
这样的话，我认为存储过程，触发器，外键是可选的，而不是强迫的，因此我可以自由的选择不去用它们。
Nevertheless, to change a DB CFG parameter online, a connection to the database is mandatory, and the UPDATE DB CFG command must include the option IMMEDIATE, as shown in Listing 15.
尽管如此，要在线改变DBCFG参数，对数据库的连接是强制性的，而且UPDATE DB CFG命令必须包含IMMEDIATE选项，如清单15所示。
This option is not mandatory: to "activate" the laundry you need to buy a washing machine.
这些设置不是强制性的：“激活”洗衣功能您需要购买一台洗衣机。
This option is not mandatory: to "activate" the laundry you need to buy a washing machine.
这些设置不是强制性的：“激活”洗衣功能您需要购买一台洗衣机。
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