producer
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... media types associated with commercially
available products. "Vendor" or "producer" are construed as
equivalent and very broadly in this context.
...
... registrant, by either a media subtype name from a well-known producer
(e.g., "vnd.mudpie") or by an IANA-approved designation of the
...
... (e.g., "vnd.mudpie") or by an IANA-approved designation of the
producer's name that is followed by a media type or product
designation (e.g., vnd.bigcompany.funnypictures).
...