I do not see anything that covers target market like who would you sell this product to if you are trying to sell to companies.
We have user personas but target market personas are different.
Like fast food restaurants, department stores, etc
We would want items like company size, what is the problem that company is trying to solve, what features would they be the most insterested in, etc. They should cascade like the other personas due in case you have mutliple products.
Thank you for your idea. It is currently possible to add custom fields to personas. This would allow you to capture specific market information needed. This article explains custom fields in more detail.