# description
A single credential requirement or prerequisite. Specifies what a candidate or enrollee must hold. Category is a broad class; subtype is the specific credential within that class. 

# properties.subtype.description
Specific credential within the category. Examples: "AWS_SAA", "BTECH_CS", "LMV_LICENSE", "Aadhaar", "Java_SE_11". 

# properties.mandatory.description
Whether this requirement is mandatory. If true, failure to satisfy it blocks the transaction. If false, it is advisory / preferred. 