[Koha-devel] meaning of mandatory subfields

[Ambrose Li [CCCGT]]

Hello,

regarding the issue of mandatory subfields. What does it mean that
a certain subfield is mandatory?

For example take ISBN. 020a is currently marked as mandatory. does
it mean that

(1) a is mandatory in the 020 field, or

(2) 020 is mandatory in addition to a being mandatory in 020?

Should we allow "not mandatory" fields that contain "mandatory"
subfileds within those "not mandatory" fields? Or am I not knowing
what I'm talking about (which could very much be true)?

-- 
Ambrose Li
Chinese Cultural Centre of Greater Toronto | http://www.cccgt.org/