import { _PdfStream } from '../../core/base-stream';
import { PdfBasicSchema } from './pdf-basic-schema';
import { PdfDublinCoreSchema } from './pdf-dublin-core-schema';
import { PdfSchema } from './pdf-schema';
import { PdfPagedTextSchema } from './pdf-paged-text-schema';
import { PdfBasicJobTicketSchema } from './pdf-basic-job-ticket-schema';
import { PdfRightsManagementSchema } from './pdf-rights-management-schema';
import { PdfCustomSchema } from './pdf-custom-schema';
/**
 * Represents the container for all XMP metadata in a PDF document.
 * ```typescript
 * // Load an existing PDF document
 * let document: PdfDocument = new PdfDocument(data, password);
 * // Create XMP metadata
 * let documentProperties: PdfDocumentInformation = document.getDocumentInformation(false);
 * // Gets XMP metadata
 * let xmp: PdfXmpMetadata = documentProperties.xmpMetadata;
 * // Sets basic schema properties
 * xmp.basicSchema.creatorTool = 'MyApp 1.0';
 * xmp.basicSchema.createDate = new Date();
 * // Sets Dublin Core properties
 * xmp.dublinCoreSchema.title = {'en-US': 'My Document'};
 * xmp.dublinCoreSchema.creator = ['John Doe'];
 * // Save the document
 * document.save('output.pdf');
 * // Destroy the document
 * document.destroy();
 * ```
 */
export declare class PdfXmpMetadata {
    private _xmlWriter;
    private _buffer;
    /**
     * Registry of namespace prefixes to avoid duplicate declarations.
     *
     * @private
     */
    _namespaceRegistry: Set<string>;
    /**
     * Custom schemas instance on the XMP metadata.
     *
     * @private
     */
    _customSchemas: PdfCustomSchema[];
    /**
     * Internal custom schemas instance on the XMP metadata.
     *
     * @private
     */
    _customSchema: PdfCustomSchema;
    private _dublinCoreSchema;
    private _basicSchema;
    private _pdfSchema;
    private _pagedTextSchema;
    private _basicJobTicketSchema;
    private _rightsManagementSchema;
    /**
     * Internal flag checks the metadata is updated or not.
     *
     * @private
     */
    _isUpdated: boolean;
    /**
     * The stream contains the serialized XMP metadata packet
     *
     * @private
     */
    _xmpStream: _PdfStream;
    /**
     * The stream contains the serialized XMP metadata packet.
     *```typescript
     * // Load an existing PDF document
     * let document: PdfDocument = new PdfDocument(data, password);
     * // Create XMP metadata
     * let documentProperties: PdfDocumentInformation = document.getDocumentInformation(false);
     * // Gets XMP metadata
     * let xmp: PdfXmpMetadata = documentProperties.xmpMetadata;
     * // Access the xmp stream data
     * let stream = xmp.xmpStream;
     * // Save the document
     * document.save('output.pdf');
     * // Destroy the document
     * document.destroy();
     * ```
     */
    xmpStream: Uint8Array;
    /**
     * Initializes a new `PdfXmpMetadata` instance.
     *
     * @private
     */
    constructor();
    /**
     * Gets or creates the Dublin Core metadata schema.
     *
     * @public
     * @returns {PdfDublinCoreSchema} The Dublin Core schema.
     *
     * ```typescript
     // Load an existing PDF document
     * let document: PdfDocument = new PdfDocument(data, password);
     * // Access the document properties
     * let documentProperties: PdfDocumentInformation = document.getDocumentInformation(false);
     * // Gets the xmp metadata
     * let xmp = documentProperties.xmpMetadata;
     * // Access Dublin Core schema
     * xmp.dublinCoreSchema.creator = ['John Doe'];
     * ```
     */
    readonly dublinCoreSchema: PdfDublinCoreSchema;
    /**
     * Gets or creates the Basic XMP schema.
     *
     * @public
     * @returns {PdfBasicSchema} The Basic schema.
     *
     * ```typescript
     // Load an existing PDF document
     * let document: PdfDocument = new PdfDocument(data, password);
     * // Access the document properties
     * let documentProperties: PdfDocumentInformation = document.getDocumentInformation(false);
     * // Gets the xmp metadata
     * let xmp = documentProperties.xmpMetadata;
     * // Access Basic schema
     * xmp.basicSchema.creatorTool = 'MyApp 1.0';
     * ```
     */
    readonly basicSchema: PdfBasicSchema;
    /**
     * Gets or creates the PDF-specific metadata schema.
     *
     * @public
     * @returns {PdfSchema} The PDF schema.
     *
     * ```typescript
     // Load an existing PDF document
     * let document: PdfDocument = new PdfDocument(data, password);
     * // Access the document properties
     * let documentProperties: PdfDocumentInformation = document.getDocumentInformation(false);
     * // Gets the xmp metadata
     * let xmp = documentProperties.xmpMetadata;
     * // Access PDF schema
     * xmp.pdfSchema.keywords = 'test, document';
     * ```
     */
    readonly pdfSchema: PdfSchema;
    /**
     * Gets or creates the Paged-Text metadata schema.
     *
     * @public
     * @returns {PdfPagedTextSchema} The Paged-Text schema.
     *
     * ```typescript
     // Load an existing PDF document
     * let document: PdfDocument = new PdfDocument(data, password);
     * // Access the document properties
     * let documentProperties: PdfDocumentInformation = document.getDocumentInformation(false);
     * // Gets the xmp metadata
     * let xmp = documentProperties.xmpMetadata;
     * // Access Paged-Text schema
     * xmp.pagedTextSchema.pageCount  = 10;
     * ```
     */
    readonly pagedTextSchema: PdfPagedTextSchema;
    /**
     * Gets or creates the Basic Job Ticket schema.
     *
     * @public
     * @returns {PdfBasicJobTicketSchema} The Basic Job Ticket schema.
     *
     * ```typescript
     // Load an existing PDF document
     * let document: PdfDocument = new PdfDocument(data, password);
     * // Access the document properties
     * let documentProperties: PdfDocumentInformation = document.getDocumentInformation(false);
     * // Gets the xmp metadata
     * let xmp = documentProperties.xmpMetadata;
     * // Access Basic Job Ticket schema
     * xmp.basicJobTicketSchema.jobRef = ['Job001'];
     * ```
     */
    readonly basicJobTicketSchema: PdfBasicJobTicketSchema;
    /**
     * Gets or creates the Rights Management schema.
     *
     * @public
     * @returns {PdfRightsManagementSchema} The Rights Management schema.
     *
     * ```typescript
     * // Load an existing PDF document
     * let document: PdfDocument = new PdfDocument(data, password);
     // Load an existing PDF document
     * let document: PdfDocument = new PdfDocument(data, password);
     * // Access the document properties
     * let documentProperties: PdfDocumentInformation = document.getDocumentInformation(false);
     * // Gets the xmp metadata
     * let xmp = documentProperties.xmpMetadata;
     * // Access Rights Management schema
     * xmp.rightsManagementSchema.isMarked = true;
     * ```
     */
    readonly rightsManagementSchema: PdfRightsManagementSchema;
    /**
     * Gets the internal custom schema.
     *
     * @private
     * @returns {PdfCustomSchema} The internal custom schema.
     */
    readonly customSchema: PdfCustomSchema;
    /**
     * Builds the complete XMP packet as a byte array.
     * Generates the XML structure with all active schemas and returns the serialized bytes.
     *
     * @private
     * @returns {Uint8Array} The XMP packet bytes.
     */
    _build(): Uint8Array;
    /**
     * Writes all active schemas to the XML writer.
     * Iterates schemas in deterministic order and delegates to _writeSchema.
     *
     * @private
     * @param {_XmlWriter} writer The XML writer instance.
     * @returns {void}
     */
    private _writeSchemas;
    /**
     * Writes a single schema's RDF Description block.
     * Handles namespace registration and delegates property serialization to the schema.
     *
     * @private
     * @param {_XmlWriter} writer The XML writer instance.
     * @param {PdfXmpSchema} schema The schema to write.
     * @returns {void}
     */
    private _writeSchema;
    /**
     * Serializes the XMP metadata to a PDF stream object.
     * Calls _build() and creates an uncompressed PdfStream with appropriate dictionary entries.
     *
     * @private
     * @returns {void}
     */
    _serializeToStream(): void;
    /**
     * Destroys the metadata object and releases all resources.
     * Clears all schema references, registry, and buffers.
     *
     * @private
     * @returns {void}
     */
    _destroy(): void;
}