In {{IMSMANG}} database the rule is unique name per data type '''and''' item. In version 5.x it was not possible to specify name when creating Custom Defined Fields (CDFs). It was only possible to specify the label which then also was set as name. Therefore there are CDFs with names like ''If the answer is No on question 14.1 then fill in the Comment field Medical and Physio'' or ''Specify''.
In version 6.0 it is possible to set the CDF's name '''and''' the name must be according to PostgreSQL rules. The name should be no longer than 60 characters and should not only contain periods (.), underscores (_), or capital letters. In addition it cannot start with a digit- z and 0 - 9, see full rules on [[Add Custom Defined Fields]]. '''But''' CDFs created with version 5.x do not follow these rules so they may be up 250 characters long and contain any character (\ @ ? é ô . space). They may also be written with another alphabet e.g. Arabic.
In {{IMSMANG}} the CDF name is contents of a database column but in the Staging area database it will be used a column name which of cause must be according to PostgreSQL rules. The Staging Area Generator handles CDF names that do not follow the rules: