table inheritance: TPH, TPT and single table vs taxonomies

according to this post and many others web resources, you can do table inheritance with Table Per Hierarchy Inheritance, Table Per Type Inheritance or Single table (single table for all sub classes). What about taxonomies? I do not know if "taxonomy" is the right word, I try to explain. I have 3 entities type: - Organization (father) - Restaurant (child) - Hotel (child) These are the tables I thought: organization_type (id, name) // (ex. "restaurant", "hotel") organization (id, name, organization_type_id) organization_taxonomy (id, name) // (ex. "rooms_number", "tables_number") organization_has_taxonomy (organization_id, organization_taxonomy_id, value) If I need another organization type, I just need to: 1. add record to organization_type table 2. add records to organization_taxonomy table Are there some drawbacks in this approach I am not thinking about?