### Complete Maven settings.xml example

Source: https://github.com/zugferd/mustangproject/blob/master/doc/development_documentation.md

An example of a complete Maven settings.xml file including servers and profiles configurations for deployment.

```xml
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                          https://maven.apache.org/xsd/settings-1.0.0.xsd">
      <localRepository/>
      <interactiveMode/>
      <usePluginRegistry/>
      <offline/>
      <pluginGroups/>
      <servers>
    <server> 
      <id>ossrh</id> 
      <username>SONATYPE TOKEN USER</username> 
      <password>SONATYPE TOKEN PASSWORD</password> 
    </server> 

      </servers>
      <mirrors/>
      <proxies/>
      <profiles>
        <profile>
          <id>ossrh</id>
          <activation>
            <activeByDefault>true</activeByDefault>
          </activation>
          <properties>
            <gpg.passphrase>PASSPHRASE</gpg.passphrase>
          </properties>
        </profile>
      </profiles>
      <activeProfiles/>
</settings>
```

--------------------------------

### Command Line Usage Examples

Source: https://github.com/zugferd/mustangproject/blob/master/Release_Notes.md

Examples of how to use the Mustang CLI for various actions like combining XML with PDF, extracting XML, and validating files.

```bash
java -jar Mustang-CLI-2.14.0.jar --action=combine
```

```bash
java -jar Mustang-CLI-2.14.0.jar --action=extract
```

```bash
java -jar Mustang-CLI-2.14.0.jar --action=validate
```

```bash
java -jar Mustang-CLI-2.14.0.jar --help
```

--------------------------------

### Build Project

Source: https://github.com/zugferd/mustangproject/blob/master/README.md

Builds the project, runs tests, and installs artifacts to the local cache.

```shell
mvn clean install

```

--------------------------------

### Install local Maven artifact

Source: https://github.com/zugferd/mustangproject/blob/master/doc/development_documentation.md

Maven command to install a generated JAR file into the local Maven cache, useful for testing functionality before a new release.

```bash
cd validator/target
mvn install:install-file -Dfile="validator-2.17.0-SNAPSHOT-shaded.jar" -Dclassifier=shaded -DgroupId="org.mustangproject" -DartifactId=validator -Dversion="2.17.0" -Dpackaging=jar -DgeneratePom=true
```

--------------------------------

### Valid File Example

Source: https://github.com/zugferd/mustangproject/blob/master/validator/README.md

An example of a valid XML file that conforms to the validation profile.

```xml
<?xml version="1.0" encoding="UTF-8"?>

<validation filename="Facture_UE_MINIMUM.pdf" datetime="2020-03-23 12:34:54">
  <pdf> 
    <report> 
      <buildInformation> 
        <releaseDetails id="core" version="1.12.1" buildDate="2018-05-08T18:57:00+02:00"/>  
        <releaseDetails id="validation-model" version="1.12.1" buildDate="2018-05-08T20:39:00+02:00"/> 
      </buildInformation>  
      <jobs> 
        <job> 
          <item size="101181"> 
            <name>/Users/jstaerk/workspace/zugferd/helper_files/../foreign_samples/fx/Facture_UE_MINIMUM.pdf</name> 
          </item>  
          <validationReport profileName="PDF/A-3B validation profile" statement="PDF file is compliant with Validation Profile requirements." isCompliant="true"> 
            <details passedRules="123" failedRules="0" passedChecks="11082" failedChecks="0"/> 
          </validationReport>  
          <duration start="1584963295227" finish="1584963296646">00:00:01.419</duration> 
        </job> 
      </jobs>  
      <batchSummary totalJobs="1" failedToParse="0" encrypted="0">
        <validationReports compliant="1" nonCompliant="0" failedJobs="0">1</validationReports>  
        <featureReports failedJobs="0">0</featureReports>  
        <repairReports failedJobs="0">0</repairReports>  
        <duration start="1584963294997" finish="1584963296679">00:00:01.682</duration> 
      </batchSummary> 
    </report>  
    <info>
      <signature>Factur/X Python</signature>
      <duration unit="ms">2361</duration>
    </info>
    <summary status="valid"/>
  </pdf>  
  <xml>
    <info>
      <version>2</version>
      <profile>urn:factur-x.eu:1p0:minimum</profile>
      <validator version="0.8.4-RESTRICTED"/>
      <rules>
        <fired>26</fired>
        <failed>0</failed>
      </rules>
      <duration unit="ms">2772</duration>
    </info>
    <summary status="valid"/>
  </xml>
  <summary status="valid"/>
</validation>
```

--------------------------------

### Complete Write Example

Source: https://github.com/zugferd/mustangproject/blob/master/doc/ZugferdDev.en.adoc

This Java code demonstrates how to create and export a ZUGFeRD invoice, including setting sender, recipient, items, and bank details, and then exporting it to a PDF file.

```java
package de.usegroup;

import org.mustangproject.*;
import org.mustangproject.ZUGFeRD.IZUGFeRDExporter;
import org.mustangproject.ZUGFeRD.TransactionCalculator;
import org.mustangproject.ZUGFeRD.ZUGFeRDExporterFromPDFA;
import java.io.IOException;
import java.math.BigDecimal;
import java.util.Date;

public class Main {
    public static void main(String[] args) {

        String sourcePDF="MustangGnuaccountingBeispielRE-20201121_508.pdf";
        try {
            IZUGFeRDExporter ze = new ZUGFeRDExporterFromPDFA().load(sourcePDF).setProducer("My Application").
                    setCreator(System.getProperty("user.name"));

            Invoice i=new Invoice().setDueDate(new Date()).setIssueDate(new Date()).setDeliveryDate(new Date())
                    .setSender(new TradeParty("ACME co", "teststr", "55232", "teststadt", "DE")
                            .addBankDetails(new BankDetails("777666555", "DE4321"))).setOwnTaxID("4711").setOwnVATID("DE19990815")
                    .setRecipient(new TradeParty("Franz Müller", "teststr.12", "55232", "Entenhausen", "DE")
                            .setContact(new Contact("nameRep", "phoneRep", "emailRep@test.com"))).setNumber("X12")
                    .addItem(new Item(new Product("Testproduct", "", "H87", new BigDecimal(19)),
                            new BigDecimal(2.5), new BigDecimal(1.0)));
            ze.setTransaction(i);
            ze.export("factur-x.pdf");
            TransactionCalculator tc=new TransactionCalculator(i);
            System.out.println("Confirm "+tc.getDuePayable()+ " is also the final amount in your PDF");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

```

--------------------------------

### Embedding ZF2 visualization

Source: https://github.com/zugferd/mustangproject/blob/master/Release_Notes.md

Example of visualizing ZUGFeRD V2 invoices using ZUGFeRDVisualizer.

```java
ZUGFeRDVisualizer zvi = new ZUGFeRDVisualizer();
xml = zvi.visualize(sourceName);
Files.write(Paths.get("factur-x.xml"), xml.getBytes());
```

--------------------------------

### Creating and Exporting an Invoice with Mustang

Source: https://github.com/zugferd/mustangproject/blob/master/Release_Notes.md

Java code example demonstrating how to create an Invoice object, set its details, and export it as a ZUGFeRD file using Mustang library.

```Java
import org.mustangproject.Contact;
import org.mustangproject.Invoice;
import org.mustangproject.Item;
import org.mustangproject.Product;
import org.mustangproject.ZUGFeRD.IZUGFeRDExporter;
import org.mustangproject.ZUGFeRD.Profiles;
import org.mustangproject.ZUGFeRD.ZUGFeRDExporterFromA1;
import java.math.BigDecimal;
import java.util.Date;

public class Main {
    public static void main(String[] args) {
    Invoice i = new Invoice().setDueDate(new Date()).setIssueDate(new Date()).setDeliveryDate(new Date()).setOwnOrganisationName("My company").setOwnStreet("teststr").setOwnZIP("12345").setOwnLocation("teststadt").setOwnCountry("DE").setOwnTaxID("4711").setOwnVATID("0815").setRecipient(new Contact("Franz Müller", "0177123456", "fmueller@test.com", "teststr.12", "55232", "Entenhausen", "DE")).setNumber("INV/123").addItem(new Item(new Product("Testprodukt", "", "C62", new BigDecimal(0)), new BigDecimal(1.0), new BigDecimal(1.0)));
        try {
            IZUGFeRDExporter ie = new ZUGFeRDExporterFromA1().load("source.pdf").setZUGFeRDVersion(2).setProfile(Profiles.EN16931);
            ie.setProfile(Profiles.EN16931).setTransaction(i).export("target.pdf");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
```

--------------------------------

### Executing the validator

Source: https://github.com/zugferd/mustangproject/blob/master/validator/README.md

Example of how to execute the Mustangproject validator from the command line, redirecting stderr and escaping file names.

```bash
exec('java -Dfile.encoding=UTF-8 -jar /path/to/ZUV-0.9.0.jar --action validate -f '.escapeshellarg($uploadfile).' 2>/dev/null', $output);
```

--------------------------------

### Invalid File Example

Source: https://github.com/zugferd/mustangproject/blob/master/validator/README.md

An example of an invalid XML file with errors in the XML part.

```xml
<?xml version="1.0" encoding="UTF-8"?>

<validation filename="Facture_UE_EXTENDED.pdf" datetime="2020-03-23 12:34:43">
  <pdf> 
    <report> 
      <buildInformation> 
        <releaseDetails id="core" version="1.12.1" buildDate="2018-05-08T18:57:00+02:00"/>  
        <releaseDetails id="validation-model" version="1.12.1" buildDate="2018-05-08T20:39:00+02:00"/> 
      </buildInformation>  
      <jobs> 
        <job> 
          <item size="109172"> 
            <name>/Users/jstaerk/workspace/zugferd/helper_files/../foreign_samples/fx/Facture_UE_EXTENDED.pdf</name> 
          </item>  
          <validationReport profileName="PDF/A-3B validation profile" statement="PDF file is compliant with Validation Profile requirements." isCompliant="true">
            <details passedRules="123" failedRules="0" passedChecks="11082" failedChecks="0"/> 
          </validationReport>  
          <duration start="1584963283448" finish="1584963284790">00:00:01.342</duration> 
        </job> 
      </jobs>  
      <batchSummary totalJobs="1" failedToParse="0" encrypted="0">
        <validationReports compliant="1" nonCompliant="0" failedJobs="0">1</validationReports>  
        <featureReports failedJobs="0">0</featureReports>  
        <repairReports failedJobs="0">0</repairReports>  
        <duration start="1584963283223" finish="1584963284825">00:00:01.602</duration> 
      </batchSummary> 
    </report>  
    <info>
      <signature>Factur/X Python</signature>
      <duration unit="ms">2296</duration>
    </info>
    <summary status="valid"/>
  </pdf>  
  <xml>
    <info>
      <version>2</version>
      <profile>urn:cen.eu:en16931:2017#conformant#urn:factur-x.eu:1p0:extended</profile>
      <validator version="0.8.4-RESTRICTED"/>
      <rules>
        <fired>97</fired>
        <failed>1</failed>
      </rules>
      <duration unit="ms">8546</duration>
    </info>
    <messages>

```

--------------------------------

### Build Mustang Project

Source: https://github.com/zugferd/mustangproject/blob/master/doc/development_documentation.md

Command to build the Mustang project using Maven wrapper.

```bash
mvn clean package
```

--------------------------------

### Responsive Styling for 450px and smaller screens

Source: https://github.com/zugferd/mustangproject/blob/master/library/src/test/resources/factur-x-vis-extended.de.html

CSS rules for adapting to very small screens.

```css
/* 450px und kleiner */
@media screen and (max-width : 450px) {
html, body { font-size: 12px; }
.menue { margin-bottom: 20px; }
button { padding-top: 5px; }
.btnAktiv, .btnInaktiv, .tab { font-size: 17px; height: 35px; }
.btnAktiv:after { top: 35px; }
.legende { display: block; float: left; width: 100%; }
.wert { display: block; float: left; width: 100%; margin-bottom: 10px }
.boxzeile { margin-bottom: 0px }
.boxdaten { height: auto; }
.haftungausschluss { margin-bottom: 20px; }
.boxinhalt { margin-top: 0px; }
.boxabstandtop { margin-top: 20px; }
.boxtitel { padding: 7px 8px; }
.box { margin-bottom: 10px; padding: 0; }
.boxabstandtop { margin-top: 10px; }
.boxdaten, .boxdatenBlock { padding: 2px 0; }
.rechnungSp1 { width: 50%; font-size: inherit; }
.rechnungSp2 { width: 15%; }
.rechnungSp3 { width: 35%; font-size: inherit; text-align: right; }
.grund { font-size: inherit; }
.titelPosition { font-size: 15px; }
.abstandUnten { margin-bottom: 5px; }
.detailsSpalte1, .detailsSpalte2, .detailsSpalte3 { font-size: inherit; line-height: inherit; }
}
```

--------------------------------

### Formatting Styles

Source: https://github.com/zugferd/mustangproject/blob/master/library/src/test/resources/factur-x-vis.fr.html

General formatting rules for colors, weights, spacing, and alignment.

```css
/* Formatierungen */
.color2 {
  color: rgba(0, 0, 0, 0.6);
}
.schwarz {
  color: #555 !important;
}
.normal {
  font-weight: normal;
}
.bold {
  font-weight: bold;
}
.abstandUnten {
  margin-bottom: 5px;
}
.abstandUntenKlein {
  margin-bottom: 10px;
}
.noPaddingTop {
  padding-top: 0 !important;
}
.ausrichtungRechts {
  text-align: right;
}
```

--------------------------------

### ZUGFeRDImporter Usage

Source: https://github.com/zugferd/mustangproject/blob/master/Release_Notes.md

Example of using the ZUGFeRDImporter to extract invoice data.

```Java
ZUGFeRDImporter zi = new ZUGFeRDImporter(inputStream);
String amount = zi.getAmount();
```

--------------------------------

### Using nodeMap.getAsString and nodeMap.getAsNodeMap

Source: https://github.com/zugferd/mustangproject/blob/master/doc/development_documentation.md

Demonstrates using nodeMap to extract string values for seller/buyer IDs, name, and description, and processing nested node maps for product characteristics and classifications.

```java

		nodeMap.getAsString("SellerAssignedID").ifPresent(this::setSellerAssignedID);
		nodeMap.getAsString("BuyerAssignedID").ifPresent(this::setBuyerAssignedID);
		nodeMap.getAsString("Name").ifPresent(this::setName);
		nodeMap.getAsString("Description").ifPresent(this::setDescription);

		nodeMap.getAsNodeMap("ApplicableProductCharacteristic").ifPresent(apcNodes -> {
			String key = apcNodes.getAsStringOrNull("Description");
			String value = apcNodes.getAsStringOrNull("Value");
			if (key != null && value != null) {
				if (attributes == null) {
					attributes = new HashMap<>();
				}
				attributes.put(key, value);
			}
		});

		nodeMap.getAsNodeMap("DesignatedProductClassification").ifPresent(dpcNodes -> {
			String className = dpcNodes.getAsStringOrNull("ClassName");
			dpcNodes.getNode("ClassCode").map(ClassCode::fromNode).ifPresent(classCode ->
				classifications.add(new DesignatedProductClassification(classCode, className)));
		});

		nodeMap.getAsString("OriginTradeCounty").ifPresent(this::setCountryOfOrigin);

```

--------------------------------

### Responsive Styling for 800px and smaller screens

Source: https://github.com/zugferd/mustangproject/blob/master/library/src/test/resources/factur-x-vis-extended.de.html

CSS rules for further adaptation to smaller screens.

```css
/* 800px und kleiner */
@media screen and (max-width : 800px) {
button { padding-top: 10px; }
.btnAktiv, .btnInaktiv, .tab { font-size: 20px; height: 40px; }
.btnAktiv:after { top: 40px; }
.rechnungSp1 { width: 55%; font-size: 15px; }
.rechnungSp2 { width: 10%; }
.rechnungSp3 { width: 35%; text-align: right; font-size: 15px; }
.grund { font-size: 15px; }
}
```

--------------------------------

### Embedding the validator - Java Usage

Source: https://github.com/zugferd/mustangproject/blob/master/Release_Notes.md

Example of using the ZUGFeRDValidator to validate an XML file.

```java
import org.mustangproject.validator.ZUGFeRDValidator;
public class Main {
    public static void main(String[] args) {
        ZUGFeRDValidator zfv = new ZUGFeRDValidator();
        System.out.println(zfv.validate("/tmp/factur-x.xml"));
    }
}
```

--------------------------------

### ZUGFeRDExporter Update

Source: https://github.com/zugferd/mustangproject/blob/master/Release_Notes.md

Example showing the change in how ZUGFeRDExporter is instantiated and configured from Mustang 1.x to 2.0.

```Java
ZUGFeRDExporter ze = new ZUGFeRDExporterFromA1Factory().setZUGFeRDConformanceLevel(ZUGFeRDConformanceLevel.COMFORT).load(SOURCE_PDF)) {
```

```Java
IZUGFeRDExporter ze = new ZUGFeRDExporterFromA1().setZUGFeRDVersion(1).setZUGFeRDConformanceLevel(ZUGFeRDConformanceLevel.EN16931).load(SOURCE_PDF)) {
```

--------------------------------

### Responsive Styling for 1023px and smaller screens

Source: https://github.com/zugferd/mustangproject/blob/master/library/src/test/resources/factur-x-vis-extended.de.html

CSS rules to adapt the layout for medium-sized screens.

```css
/* 1023px und kleiner */
@media screen and (max-width : 1023px) {
.box { display: block; width: 100%; margin-bottom: 20px; }
.boxabstandtop { margin-top: 15px; }
.subBox:first-child { margin-bottom: 0 !important; }
.subBox:last-child { border-left: 1px solid rgba(4, 101, 161, 0.2); }
.first > .boxzeile > .subBox { border-top: none !important; }
.first > .boxzeile > .subBox:first-child { border-top: 1px solid rgba(4, 101, 161, 0.2) !important; }
.first > .boxzeile { margin-bottom: 0; }
#uebersichtUeberweisung.box { border-left: 1px solid rgba(4, 101, 161, 0.2); }
#uebersichtLastschrift.box { margin-bottom: 0; }
.boxzeile { display: block; margin-bottom: 5px; }
.boxzeile:after { visibility: hidden; display: block; font-size: 0; content: " "; clear: both; height: 0; }
#details > .boxtabelle > .boxzeile { margin-bottom: 0px; }
.boxcell { display: block; }
.boxcell:last-child { margin-top: 20px; }
.boxZweispaltig { width: 100%; }
.legende { display: block; float: left; width: 170px; padding: 5px 0; height: auto; }
.wert { display: block; float: left; width: calc(100% - 170px); padding: 11px 10px !important; line-height: 1.3; min-height: 38px; height: auto; }
.boxdaten .legende { height: auto; }
.rechnungsZeile .boxdaten { padding: 5px 0; }
.boxabstand { display: none; }
.boxtabelleEinspaltig { width: 100%; }
.boxSpalte1 { display: block; width: auto; }
.boxSpalte2 { display: block; width: auto; padding-left: 0px; margin-top: 1.2rem; }
.detailsSpalte1, .detailsSpalte2, .detailsSpalte3 { width: 100%; float: none; padding-right: 0px; }
.detailsSpalte2, .detailsSpalte3 { margin-top: 15px; }
.detailsSpalte2, .detailsSpalte3 { margin-top: 10px; }
.tableNumberAlignRight { display: block; width: 130px; text-align: right; }
}
```

--------------------------------

### Export XML

Source: https://github.com/zugferd/mustangproject/blob/master/Release_Notes.md

Example of creating an Invoice object and generating its XML representation using ZUGFeRD2PullProvider.

```java
Invoice i = new Invoice().setDueDate(new Date()).setIssueDate(new Date()).setDeliveryDate(new Date()).setOwnOrganisationName(orgname).setOwnStreet("teststr").setOwnZIP("55232").setOwnLocation("teststadt").setOwnCountry("DE").setOwnTaxID("4711").setOwnVATID("0815").setRecipient(new Contact("Franz Müller", "0177123456", "fmueller@test.com", "teststr.12", "55232", "Entenhausen", "DE")).setNumber(number).addItem(new Item(new Product("Testprodukt", "", "C62", new BigDecimal(0)), amount, new BigDecimal(1.0)));
```

```java
ZUGFeRD2PullProvider zf2p = new ZUGFeRD2PullProvider();
zf2p.generateXML(i);
String theXML = new String(zf2p.getXML(), StandardCharsets.UTF_8);
```

--------------------------------

### Responsive Styling for 380px and smaller screens

Source: https://github.com/zugferd/mustangproject/blob/master/library/src/test/resources/factur-x-vis-extended.de.html

CSS rules for adapting to very small screens, with further font size adjustments.

```css
/* 380px und kleiner */
@media screen and (max-width : 380px) {
html, body { font-size: 11px; line-height: 100%; }
.btnAktiv, .btnInaktiv, .tab { font-size: 15px; }
.boxdaten .boxdatenBlock { padding: 2px 0; }
.boxinhalt { margin-top: 0px; }
.boxtitel { padding: 5px 7px; }
}
```

--------------------------------

### Maven settings.xml servers configuration

Source: https://github.com/zugferd/mustangproject/blob/master/doc/development_documentation.md

Configuration snippet for the 'servers' section in Maven's settings.xml to include credentials for GitHub and OSSRH.

```xml
  <servers> 
    <server> 
      <id>github</id> 
      <password>GITHUB-TOKEN</password> 
    </server> 
    <server> 
      <id>ossrh</id> 
      <username>jstaerk</username> 
      <password>JIRA-PASSWORD</password> 
    </server> 
   </servers> 
```

--------------------------------

### Maven release commands

Source: https://github.com/zugferd/mustangproject/blob/master/doc/development_documentation.md

Sequence of Maven commands to clean, prepare, and perform a release.

```bash
mvn clean install
  * `mvn javadoc:javadoc`. If that works you can 
  * clean the release with `mvn release:clean` and prepare the release with
  * `mvn release:prepare` and enter the version numbers. 
  * After that is through you can create a new release via `mvn release:perform`.This will also update the maven repo.
```

--------------------------------

### Embedding ZF1 to ZF2 migration

Source: https://github.com/zugferd/mustangproject/blob/master/Release_Notes.md

Example of migrating XML from ZUGFeRD V1 to V2 using the XMLUpgrader.

```java
XMLUpgrader zmi = new XMLUpgrader();
String xml = zmi.migrateFromV1ToV2(xmlName);
Files.write(Paths.get(outName), xml.getBytes());
```

--------------------------------

### New ZUGFeRDInvoiceImporter Usage

Source: https://github.com/zugferd/mustangproject/blob/master/Release_Notes.md

Example demonstrating the usage of the new ZUGFeRDInvoiceImporter to extract invoice details and perform assertions.

```Java
ZUGFeRDInvoiceImporter zii=new ZUGFeRDInvoiceImporter(TARGET_PDF);

Invoice invoice=null;
try {
	invoice=zii.extractInvoice();
} catch (XPathExpressionException | ParseException e) {
// handle Exceptions
}
assertFalse(hasExceptions);
// Reading ZUGFeRD
assertEquals("Bei Spiel GmbH", invoice.getOwnOrganisationName());
assertEquals(3, invoice.getZFItems().length);
assertEquals("400.0000", invoice.getZFItems()[1].getQuantity().toString());

assertEquals("160.0000", invoice.getZFItems()[0].getPrice().toString());
assertEquals("Heiße Luft pro Liter", invoice.getZFItems()[2].getProduct().getName());
assertEquals("LTR", invoice.getZFItems()[2].getProduct().getUnit());
assertEquals("7.00", invoice.getZFItems()[0].getProduct().getVATPercent().toString());
assertEquals("RE-20170509/505", invoice.getNumber());

SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
assertEquals("2017-05-09",sdf.format(invoice.getIssueDate()));

assertEquals("Bahnstr. 42", invoice.getRecipient().getStreet());
assertEquals("88802", invoice.getRecipient().getZIP());
assertEquals("DE", invoice.getRecipient().getCountry());
assertEquals("Spielkreis", invoice.getRecipient().getLocation());

TransactionCalculator tc=new TransactionCalculator(invoice);
assertEquals(new BigDecimal("571.04"),tc.getTotalGross());
```

--------------------------------

### NodeList from an XPath

Source: https://github.com/zugferd/mustangproject/blob/master/doc/development_documentation.md

Example of compiling an XPath expression to retrieve a NodeList of elements with a local name 'PrepaidAmount' and extracting attributes from a 'GlobalID' node.

```java
     		xpr = xpath.compile("//*[local-name()=\"PrepaidAmount\"]");
			NodeList prepaidNodes = (NodeList) xpr.evaluate(getDocument(), XPathConstants.NODESET);
			nodeMap.getNode("GlobalID").ifPresent(idNode -> {
				if (idNode.hasAttributes()
					&& idNode.getAttributes().getNamedItem("schemeID") != null) {
					globalId = new SchemedID()
						.setScheme(idNode.getAttributes().getNamedItem("schemeID").getNodeValue())
						.setId(idNode.getTextContent());
				}
			});
```

--------------------------------

### Complete Sample Source Code for Reading ZUGFeRD Data

Source: https://github.com/zugferd/mustangproject/blob/master/doc/ZugferdDev.en.adoc

A complete Java class demonstrating how to read ZUGFeRD data from a PDF.

```java
package de.usegroup;

import org.mustangproject.CalculatedInvoice;
import org.mustangproject.ZUGFeRD.ZUGFeRDInvoiceImporter;

import javax.xml.xpath.XPathExpressionException;
import java.text.ParseException;

public class Main {
    public static void main(String[] args) {
        ZUGFeRDInvoiceImporter zii=new ZUGFeRDInvoiceImporter("MustangGnuaccountingBeispielRE-20201121_508.pdf");
        CalculatedInvoice ci=new CalculatedInvoice();
        try {
            zii.extractInto(ci);
            System.out.println("Pay: "+ci.getDuePayable());
        } catch (XPathExpressionException e) {
            throw new RuntimeException(e);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }
}
```