//! [`ProductCategory`] — a typed product sub-classification within a sector.
use ;
/// Typed product category — a sub-type *within* a sector.
///
/// **Not** a dispatch key. [`Sector`](crate::domain::sector::Sector) selects
/// the applicable delegated act, schema, and plugin; a `ProductCategory` is a
/// finer classification a plugin may branch on (e.g. battery `ev` vs
/// `portable`, electronics `smartphone`). The list is extensible via `Other`.
/// See `DATA-MODEL.md` §3.5.