关于ITU-T X.680中COMPONENTS OF组件自动标签规则的技术咨询

Hey there, let's dive into how COMPONENTS OF components are tagged when working in AUTOMATIC TAGS mode in ASN.1—this is a common point of confusion, so it's great you're digging into the spec details!

Core Rule from Section 25.4 #

The spec has a clear note that lays out the critical behavior here:

其效果是，ComponentTypeLists中存在的显式标签会抑制自动标签的应用，但COMPONENTS OF后跟随的Type中的标签则不会。

Let me break that down into plain language:

• If you define components directly in a ComponentTypeList with explicit tags, those tags take priority—automatic tags won't be applied to those components at all.
• But when you use COMPONENTS OF to pull in components from another type, any tags that exist on that referenced type don't block automatic tagging from being applied.

Logical Inference #

From that rule, we can draw a direct conclusion:
Any tags that are part of the type you're referencing with COMPONENTS OF won't be copied over to the inserted components. Instead, the automatic tagging rules will fully apply to those components as if they were written directly into the new type without any pre-existing tags.

This means you don't have to worry about inherited tags messing with your automatic tagging setup when using COMPONENTS OF—the spec makes it clear those tags don't carry over or interfere.

内容的提问来源于stack exchange，提问作者YaFred