DedeCMS dede_channeltype table field comment

I spent some time sorting it out, but I still have several fields that I don't know. Tell me what I want to know!
Dede_channeltype

Id channel ID
Nid recognition ID
Typename model name
Maintable main table
Addtable additional table
Addcon file publishing program
Mancon
Editcon File Modification Program
Useraddcon front-end member publishing program
Usermancon front-end member Management Program
Usereditcon front-end member modification program
Fieldset
Additional fields in the listfields list
Addfields
Issystem model properties (0: Automatic model,-1: system model, 1: Automatic Model)
Isshow
Does issend support contribution by members?
Default contribution status of arcsta members (-1: not reviewed, 0: reviewed (html is automatically generated), 1: reviewed (dynamic document only ))
Usertype: Authorized contributor member group (Field Value: individual or enterprise or "" (no space ))
Sendrank members can contribute (0: tourists, 10: registered members, 50: Intermediate members, 100: senior members)
Isdefault column list option (1: Link to the detail page, 0: Link to the first page of the list,-1: Use the dynamic page)
Does the needdes contribution use a summary?
Whether to use images for needpic submissions
The title of the titlename submission.
Onlyone contribution is unique
Dfcid default topic ID