[TYPO3-mvc] Database structure when using ExtBase

[Sebastian Gebhard]

I was taking a look at the ext_tables.sql of blog_example.

Tables defined there are:

tx_blogexample_domain_model_blog
tx_blogexample_domain_model_post
tx_blogexample_domain_model_comment
tx_blogexample_domain_model_tag
tx_blogexample_post_tag_mm

1. Do I get it right that every table that's NOT a mm-relation table has 
to/should include "domain_model"?


Blog has a property posts
Post has the properties blog_uid and blog_table

2. Are bidirectional relationships needed/recommended?
3. Why does blog_table exist?

3 fields/properties for one 1:n relationship seems unneccessary complex 
to me..