Marking is a step or technique in MDA in which additional information, not within the semantic scope of the model itself, can be added to a model solely for use by automation later.
标记是 MDA 中的一个步骤或技术，在这个步骤当中，附加的信息（不包含在模型本身的语义范围中）能够被加入到模型中，在随后的自动过程中单独使用。
The read-first technique involves refactoring (or writing) the application logic and workflow so that all processing and read operations occur first, outside of a transaction's scope.
先读取技巧涉及重构（或编写）应用程序逻辑和工作流，以便所有的处理和读取操作在事务作用域的外部首先发生。
With this technique, you'll typically encounter the same trade-off as with the read-first technique: read operations are typically done outside of the context of the transaction scope.
通过此技巧，您通常会遇到与先读取技巧相同的折衷问题：读取操作通常是在事务作用域的外部完成的。
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