Module composition 

Schema composition graph types

Tracks the relationships between schema documents created by xs:include, xs:import, xs:redefine, and xs:override directives.

These types are populated during directive resolution (Step 1) and consumed by later pipeline stages for document-scoped component lookup, provenance tracking, and override processing order.

Structs

ComponentIdentity

Unique identity of a schema component (kind + QName).

ComponentOrigin

Tracks which document a component originated from.

CompositionEdge

A directed edge in the schema composition graph.

DocumentComponentIndex

Per-document index of top-level components declared by a single schema document.

EffectiveComponent

An effective top-level component with its provenance metadata.

Enums

ComponentKey

A typed arena key for any top-level schema component.

ComponentKind

Classification of a top-level schema component.

CompositionAction

How a component arrived in the effective schema set.

CompositionEdgeKind

The kind of composition relationship between two schema documents.

Functions

overridden_action

Build a CompositionAction::Overridden action (XSD 1.1).

record_provenance

Record a composition provenance entry into the effective components map.

redefined_action

Build a CompositionAction::Redefined action.