自定义话题类型？

[pfaffman (Jay Pfaffman)]

Sounds like a job for tags.

It's Time We Talked About Tags

Originally published at: It’s Time We Talked About Tags Consider the typical sections of a daily newspaper: Arts, Sports, Business, Travel, Local, and World. Any given article belongs to just one of those sections, and the content in each section is quite different, such that some people, for example, may only ever read the Sports or Business sections. These are what we call categories.…