We asked our address parser what it couldn't read
· 5 min read
Feed an address into a sequence labeler and part of it goes missing. The model tags the tokens it recognizes — house number, street, city — and the characters it doesn't understand fall on the floor. decodeAsJSON hands you back a tidy object with every field in its place, and nothing in that object tells you the model just shrugged at a fifth of the input.
So you ship that parser. It looks great on the addresses you tested it against. And you have no idea what it's dropping in production, because the output format was built to hide exactly that.