//! `IfcGeometricConstraintResource`: object placement and grids.
//!
//! This schema answers "where is this element in the world". It is small (11
//! entities) and disproportionately important: nothing renders in the right
//! place without it.
//!
//! # The two placement kinds
//!
//! - [`local::LocalPlacement`] nests. An element sits in a storey, in a
//! building, on a site, and world position is the composition of that chain.
//! - [`grid::GridPlacement`] positions relative to the intersection of two
//! construction grid axes, which is how structural drawings are laid out.
//!
//! Both are `IfcObjectPlacement` subtypes, so a product's `ObjectPlacement`
//! may be either and consumers must handle both.
pub use ConnectionGeometry;
pub use ;
pub use LocalPlacement;
pub use ;