Change to the cardinality of fields in the output message, such as changing mandatory fields to optional fields, will break existing consumers.

对输出消息中的字段的基数性进行更改(如将强制字段更改为了可选字段)将中断现有使用者。

youdao

The change was not mandatory, and the spokesman would not comment on Air France's failure to follow the advice.

这种改变不是强制性的,所以这位发言人没有就法航没有采取此项建议作出任何评论。

youdao

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DB CFG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。

youdao

Then came an exhilarating acceleration, with the next 42 scored off 29 balls, before Steyn made a stunning return with the mandatory change of ball after 34 overs.

BBC: Steyn burst destroys Bangladesh

However, in one-day internationals a mandatory ball change is now enforced after 34 overs because the white titanium dioxide dye rubs off the leather.

BBC: Pink balls set for one-day trials

Both are keen de-regulators and Mr Paterson is pushing a new " dash for gas", a policy the Committee on Climate Change says is incompatible with mandatory targets under the Climate Change Act to reduce emissions 80% by 2050.

BBC: Harrabin's Notes: Climate shuffles