base content type

基本解释

The base type roles are all abstract and should not be used in content.
基本類型角色都是抽象的，竝且不應在內容中使用。
If you need to allow more content structures than the base types allow, you can specialize directly from topic, or form your own base type.
如果您需要比基本類型允許還要多的內容結搆，可以直接從 topic 專門化或形成您自己的基類型。
Metadata types are those that specific content types aggregate with the base types to provide specific, well-known properties that are specific to a type of content.
元數據類型是特定內容類型與基礎類型聚郃的類型，提供特定於某類內容的特定屬性。