Even though the biom-format described [here](http://biom-format.org/documentation/format_versions/biom-1.0.html) has the fields in the same order for the example tables, this order isn't enforced since they are JSON objects. Thus, the order of the top-level fields won't always be ```id```, ```format```, ```format_url```, etc. so grabbing all fields up to ```rows``` will change depending on the BIOM file.