Database design / normalization structure needs to contain ANDs, ORs, optional elements and their relationships

Question

I want to store the details of college courses in a (MySql) database but I\'m not sure how to maintain the relationship between modules and selections.

Basically, a cour

Answer 1

A production quality system using and/or's (like your system) that you can review for free is entlib 5.0 Security block. http://entlib.codeplex.com/

Each rule is retrieved by name to get the full expression. the patterns & practice team created their own short DSL for the expression to avoid complicating the xml structure/db structure.

this is inside the hands on labs exercise ex02 app.config. To store rules inside the database you would need to implement a custom AuthorizationRuleProvider.

R: = rolename; U: = username

dev usage

    public static AssignBug Create()
    {
        // TODO: Check Authorization
        if (!SecurityHelper.Authorized(AuthRule.Assign))
        {
            throw new SecurityException();
        }

        return new AssignBug();
    }

While not an immediate answer I think this provides a good example of how to implement rule-expression based systems.