update

ts/classes.xinvoice.ts

@@ -9,7 +9,7 @@ import {
   PDFString,
 } from 'pdf-lib';
 import { FacturXEncoder } from './formats/facturx.encoder.js';
-import { XInvoiceEncoder } from './formats/xinvoice.encoder.js';
+import { XInvoiceEncoder } from './formats/xrechnung.encoder.js';
 import { DecoderFactory } from './formats/decoder.factory.js';
 import { BaseDecoder } from './formats/base.decoder.js';
 import { ValidatorFactory } from './formats/validator.factory.js';
@@ -450,18 +450,10 @@ export class XInvoice implements plugins.tsclass.business.ILetter {
           filename = 'factur-x.xml';
           description = 'Factur-X XML Invoice';
           break;
-        case 'zugferd':
-          filename = 'zugferd.xml';
-          description = 'ZUGFeRD XML Invoice';
-          break;
         case 'xrechnung':
           filename = 'xrechnung.xml';
           description = 'XRechnung XML Invoice';
           break;
-        case 'ubl':
-          filename = 'ubl.xml';
-          description = 'UBL XML Invoice';
-          break;
       }
 
       // Make sure filename is lowercase (as required by documentation)

ts/formats/decoder.factory.ts

@@ -1,6 +1,6 @@
 import { BaseDecoder } from './base.decoder.js';
 import { FacturXDecoder } from './facturx.decoder.js';
-import { XInvoiceDecoder } from './xinvoice.decoder.js';
+import { XInvoiceDecoder } from './xrechnung.decoder.js';
 
 /**
  * Factory class for creating the appropriate decoder based on XML format.

ts/formats/xrechnung.decoder.ts

@@ -7,7 +7,7 @@ import { BaseDecoder } from './base.decoder.js';
  * XRechnung is the German implementation of the European standard EN16931 
  * for electronic invoices to the German public sector.
  */
-export class XInvoiceDecoder extends BaseDecoder {
+export class XRechnungDecoder extends BaseDecoder {
   private xmlDoc: Document | null = null;
   private namespaces: { [key: string]: string } = {
     cbc: 'urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2',

ts/formats/xrechnung.encoder.ts

@@ -2,19 +2,19 @@ import * as plugins from '../plugins.js';
 
 /**
  * A class to convert a given ILetter with invoice data
- * into an XInvoice/XRechnung compliant XML (based on UBL).
+ * into an XRechnung compliant XML (based on UBL).
  * 
  * XRechnung is the German implementation of the European standard EN16931 
  * for electronic invoices to the German public sector.
  */
-export class XInvoiceEncoder {
+export class XRechnungEncoder {
 
   constructor() {}
 
   /**
-   * Creates an XInvoice compliant XML based on the provided letter data.
+   * Creates an XRechnung compliant XML based on the provided letter data.
    */
-  public createXInvoiceXml(letterArg: plugins.tsclass.business.ILetter): string {
+  public createXRechnungXml(letterArg: plugins.tsclass.business.ILetter): string {
     // Use SmartXml for XML creation
     const smartxmlInstance = new plugins.smartxml.SmartXml();
 

ts/index.ts

@@ -4,8 +4,8 @@ import { XInvoice } from './classes.xinvoice.js';
 // Import format-specific encoder/decoder classes
 import { FacturXEncoder } from './formats/facturx.encoder.js';
 import { FacturXDecoder } from './formats/facturx.decoder.js';
-import { XInvoiceEncoder } from './formats/xinvoice.encoder.js';
-import { XInvoiceDecoder } from './formats/xinvoice.decoder.js';
+import { XInvoiceEncoder } from './formats/xrechnung.encoder.js';
+import { XInvoiceDecoder } from './formats/xrechnung.decoder.js';
 import { DecoderFactory } from './formats/decoder.factory.js';
 import { BaseDecoder } from './formats/base.decoder.js';
 

ts/interfaces.ts

@@ -11,6 +11,7 @@ export interface IParty {
   Name: string;
   Address: IAddress;
   Contact: IContact;
+  TaxRegistration?: string;
 }
 
 export interface IAddress {