5.04-01 From source system, create a code defining all attributes


Ideally, this would be a separate file that is unique vs. using the same file for the transactional load


5.04-01a Code is >60 characters: If the code is >60 characters, you will have to use combination of properties


Related to Rule: 
5.04-02 Create separate files for attributes and data


Best Practice article:
Data Hubs: Purpose and Peak Performance