一、 packages
二、 options
三、 message
- field types
- tags
- field rules(required,optional,repeated)/3.0->(singular, repeated)
- reserved fields
- scalar types
- default values
- eunm
- import/import public
- nested types
- extentions
- update a message
- oneof
- maps
一、 packages
二、 options
三、 message
转载于:https://www.cnblogs.com/guoyang0927/p/5865324.html