}

    @Nonnull
    default T read(@Nonnull Reader reader) throws XmlReaderException {
        return read(reader, true);
    }

    @Nonnull
    default T read(@Nonnull Reader reader, boolean strict) throws XmlReaderException {
        return read(XmlReaderRequest.builder().reader(reader).strict(strict).build());
    }

    @Nonnull

    }

    public void addMessage(String message) {
        messages.add(message);
    }

    public String toString() {
        return render("");
    }

    public String render(String indentation) {
        if (messages.size() == 0) {
            return indentation + "There were no validation errors.";
        }

        StringBuilder message = new StringBuilder();

        ExtensionDescriptor extensionDescriptor = new ExtensionDescriptor();

        XmlNode dom;
        try {
            XMLStreamReader reader = WstxInputFactory.newFactory().createXMLStreamReader(is);
            dom = XmlNodeStaxBuilder.build(reader);
        } catch (XMLStreamException e) {
            throw new IOException(e.getMessage(), e);
        }

        if (!"extension".equals(dom.getName())) {

        // [01] clean:clean
        // [02] modello:xpp3-writer
        // [03] modello:java
        // [04] modello:xpp3-reader
        // [05] modello:xpp3-writer
        // [06] modello:java
        // [07] modello:xpp3-reader
        // [08] plugin:descriptor
        // [09] resources:resources
        // [10] compiler:compile
        // [11] resources:testResources

    Path locateExistingPom(@Nonnull Path project);

    /**
     * Reads the model from the specified byte stream. The stream will be automatically closed before the method
     * returns.
     *
     * @param request The reader request to deserialize the model, must not be {@code null}.
     * @return The deserialized model, never {@code null}.
     * @throws IOException If the model could not be deserialized.

        Xpp3Dom httpHeaders = new Xpp3Dom("httpHeaders");
        Xpp3Dom property = new Xpp3Dom("property");
        Xpp3Dom headerName = new Xpp3Dom("name");
        headerName.setValue("header");
        Xpp3Dom headerValue = new Xpp3Dom("value");
        headerValue.setValue("value");
        property.addChild(headerName);
        property.addChild(headerValue);
        httpHeaders.addChild(property);

              <goal>xsd</goal>
            </goals>
          </execution>
          <execution>
            <id>standard</id>
            <goals>
              <goal>java</goal>
              <goal>xpp3-reader</goal>
              <goal>xpp3-writer</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>

import org.eclipse.aether.resolution.VersionResolutionException;
import org.eclipse.aether.resolution.VersionResult;
import org.eclipse.aether.transfer.ArtifactNotFoundException;

/**
 * Default artifact descriptor reader.
 */
@Named
@Singleton
public class DefaultArtifactDescriptorReader implements ArtifactDescriptorReader {
    private final RemoteRepositoryManager remoteRepositoryManager;

h3. Plugins

* Execution model
* Metadata model
* Metadata tooling
 ** Metadata extractor
 ** Metadata reader
 ** Metadata writer
 ** Metadata adapter (if required for the target system)
* Maven packaging and lifecycle
* Maven test harness for plugin execution model
* Eclipse IDE tooling for plugin execution model and metadata model

- we also seem to have information like the plugin lifecycle model that's buried inside the maven execution model

throws java.io.IOException, org.codehaus.plexus.util.xml.pull.XmlPullParserExcepti; public org.apache.maven.artifact.repository.metadata.Metadata read(java.io.Reader, boolean) throws java.io.IOException, org.codehaus.plexus.util.xml.pull.XmlPullParserExcepti; public org.apache.maven.artifact.repository.metadata.Metadata read(java.io.Reader) throws java.io.IOException, org.codehaus.plexus.util.xml.pull.XmlPullParserExcepti; public org.apache.maven.artifact.repository.metadata.Metadata read(java.io.InputStream,...