/** The id-agnostic, order-agnostic semantic structure of a BPMN model. Two
 *  models are structurally equal iff their three multisets are equal. */
export interface CanonicalModel {
    /** Semantic descriptor of every flow node (task/gateway/event/subProcess),
     *  sorted. Each carries its type, definition, and edge-degree signature. */
    nodes: string[];
    /** Every sequence flow as `«fromNode» =[tag]=> «toNode»`, plus structural
     *  attach (boundary→host) and containment (subProcess→child) edges, sorted. */
    flows: string[];
    /** The full semantic identity of every message a catch event subscribes to,
     *  sorted (deduped): the serialized `<bpmn:message>` definition — its name plus
     *  the `zeebe:subscription correlationKey` and any `zeebe:properties` envelope —
     *  so a differing correlation key or envelope is a structural difference. */
    messages: string[];
}
/** Normalize a BPMN XML document to its canonical semantic model. Strips DI and
 *  canonicalizes ids, child ordering, and sequence-flow ids so only semantic
 *  structure remains. */
export declare function normalize(bpmnXml: string): CanonicalModel;