Rules for AIP-140, covering field names.
|abbreviations||Field names should use common abbreviations.|
|base64||Base64 fields should use the `bytes` type.|
|lower-snake||Field names should use `snake_case`.|
|numbers||Field names should not have words beginning with numbers.|
|prepositions||Fields must not include prepositions in their names.|
|reserved-words||Field names must not be reserved words.|
|underscores||Field names must not have goofy underscores.|
|uri||Field names should prefer `uri` to `url`.|
Note: Because AIPs sometimes cover topics that have some overlap, some rules related to field names may be included in the rules for other AIPs.