Attributes / fields in blue and black

Hi all,

Because there are some attributes in the cis that are blue? what do they represent?

fields.PNG

If I need to create a new attribute, should I do it in my father?

When you update the version, are the manually created attributes retained? or are these lost?

Regarding attributes, is there one that identifies the role of the server? db, webserver ...

 

 

Thanks,