In HivePress, non-selectable attributes (e.g. text, number) are stored as meta fields with “hp_{field_name}” key (for example the Phone field is stored as “hp_phone”), while selectable (e.g. select, radio buttons, multiple checkboxes) are stored as terms of taxonomies with “hp_listing_{field_name}” name (for example the Type field is stored as “hp_listing_type”).
You can check the WP database schema here Database Description « WordPress Codex