/**
 * Requirement Diagram AST Types
 *
 * Represents requirement diagrams with requirements, elements, and relationships.
 */
/**
 * Requirement types
 */
export type RequirementType = 'requirement' | 'functionalRequirement' | 'interfaceRequirement' | 'performanceRequirement' | 'physicalRequirement' | 'designConstraint';
/**
 * Risk levels for requirements
 */
export type RiskLevel = 'low' | 'medium' | 'high';
/**
 * Verification methods for requirements
 */
export type VerifyMethod = 'analysis' | 'demonstration' | 'inspection' | 'test';
/**
 * Relationship types between requirements and elements
 */
export type RelationshipType = 'contains' | 'copies' | 'derives' | 'satisfies' | 'verifies' | 'refines' | 'traces';
/**
 * Diagram direction
 */
export type RequirementDirection = 'TB' | 'BT' | 'LR' | 'RL';
/**
 * A requirement in the diagram
 */
export interface Requirement {
    /** Requirement name/identifier in the diagram */
    name: string;
    /** Requirement type */
    requirementType: RequirementType;
    /** Requirement ID (from id: field) */
    id?: string;
    /** Requirement text/description */
    text?: string;
    /** Risk level */
    risk?: RiskLevel;
    /** Verification method */
    verifyMethod?: VerifyMethod;
}
/**
 * An element in the diagram (represents a system component)
 */
export interface RequirementElement {
    /** Element name */
    name: string;
    /** Element type (e.g., "simulation", "module") */
    type?: string;
    /** Document reference */
    docRef?: string;
}
/**
 * A relationship between requirements and elements
 */
export interface RequirementRelationship {
    /** Source entity name (requirement or element) */
    source: string;
    /** Target entity name (requirement or element) */
    target: string;
    /** Relationship type */
    relationshipType: RelationshipType;
}
/**
 * Class definition for styling
 */
export interface RequirementClassDef {
    /** Class name */
    name: string;
    /** CSS styles */
    styles: string[];
}
/**
 * The complete Requirement Diagram AST
 */
export interface RequirementAST {
    type: 'requirement';
    /** Diagram direction */
    direction: RequirementDirection;
    /** All requirements */
    requirements: Map<string, Requirement>;
    /** All elements */
    elements: Map<string, RequirementElement>;
    /** All relationships */
    relationships: RequirementRelationship[];
    /** Class definitions */
    classDefs: Map<string, RequirementClassDef>;
    /** Class assignments (entity name -> class names) */
    classes: Map<string, string[]>;
    /** CSS style assignments (entity name -> styles) */
    styles: Map<string, string[]>;
    /** Accessibility title */
    accTitle?: string;
    /** Accessibility description */
    accDescription?: string;
}
/**
 * Create an empty Requirement Diagram AST
 */
export declare function createEmptyRequirementAST(): RequirementAST;
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