Comment by ggm
6 days ago
A salutory lesson in field overloading and structured keys. There must be a aphorism for "things you cannot do with a key, if you don't know in advance thats how the key works" list.
6 days ago
A salutory lesson in field overloading and structured keys. There must be a aphorism for "things you cannot do with a key, if you don't know in advance thats how the key works" list.
Unfortunately, for isbns even if you know how the key works in theory and should be used by standard, reality will break you very soon. It’s quite loose. At least it was 10 years ago when I worked in the area of book catalogs matching, per different online stores.