Id-a unique identifier for the constraint.

id -约束的惟一标识符。

youdao

If the constraint has a message associated with it (through the message Id), the {0} variable in the message is substituted by the context element — unless it is between single quotes.

如果约束使用了一个消息关联(通过消息id)，消息中的{0}变量就被上下文的元素所取代——处非它使用单引号括住。

youdao

Now you set the store ID and supplier ID fields so that they do not accept an empty value. Of course, you can add a schema constraint into the XForms model to achieve this.

现在，设置storeID和supplier ID字段以使这两个字段不接受空值。

youdao

Now you set the store ID and supplier ID fields so that they do not accept an empty value. Of course, you can add a schema constraint into the XForms model to achieve this.

现在，设置storeID和supplier ID字段以使这两个字段不接受空值。

youdao