Shorter Dataset Field Names Recommended

With Summer ’15 Plus, we recommend that field names in datasets use no more than 40 characters. That way, you can reduce the likelihood of exceeding character limits when you augment datasets.

Long field names increase the likelihood of exceeding character limits when you augment datasets, because names are appended. Field names longer than 40 characters are currently supported, but we recommend shortening them to avoid issues. Field name character limits may be changed in a future release.