Metadata fields Question

You can find the information for any particular field/value for the Dropbox API in the documentation. For example, it sounds like you're referring to the 'id' and 'rev' values, such as in the FileMetadata type as returned by /2/files/get_metadata, for instance.

 

In the documentation there, the 'id' field value is specified as 'String(min_length=1)' meaning it is a string at least one character long, but with no maximum length guaranteed.

 

Likewise, the 'rev' field value is specified as 'String(min_length=9, pattern="[0-9a-f]+")' meaning it is a string at least nine characters long, but with no maximum length guaranteed.