# Membership

Forms can have a price calculated from it's definition and submitted data. For a discount, the administrator can create a membership program. In the system, that means a collection of strings. In the form definition, the administrator defines, which membership program applies what discount and how to extract the key into the membership program from the from submission.

## Matching the keys

The membership is a collection of keys. But some types of them are hard to match exactly. For example it might be important to ignore case or be culture invariant. For this reason, second column in the membership table is used, which is for the normalized key, that must be matched exactly against another normalized key. 

For example, for full names, the process of normalization might remove diacritics or convert to lowercase. The same process must be applied when looking for the key.