maven.multiproject.includes property.
 2. it works without problems only for projects with relative paths, e.g., from
 one CVS repository.. for projects from multiple SCM repositories it's harder
 to maintain the same relative links on all developer computers.
 not sure the unified source directory structure addresses this issue.

 Properties

 maven.user.config.dir (system,default=${user.home}/.m2)

                        // currently processing the entry point - it should not have any entry incident edges
                        res.getEntry().getMd().setWhy("This is a graph entry point. No links.");
                    } else {
                        // System.out.println("--->"+v.getMd().toDomainString()
                        // +" has been terminated on this entry set\n-------------------\n"

        <field>
          <name>subscribe</name>
          <version>3.0.0+</version>
          <description>
            The email address or link that can be used to subscribe to
            the mailing list.  If this is an email address, a
            {@code mailto:} link will automatically be created
            when the documentation is created.
          </description>
          <type>String</type>
        </field>

                    it.hasNext(); ) {
                URL url = it.next();
                List<String> lines;
                try (InputStream is = url.openStream();
                        BufferedReader reader = new BufferedReader(new InputStreamReader(is, StandardCharsets.UTF_8))) {
                    lines = reader.lines()
                            .map(String::trim)

 * <tr><td><code>session</code></td>           <td></td>               <td>the actual {@link MavenSession}</td></tr>
 * <tr><td><code>session.*</code></td>         <td>(since Maven 3)</td><td></td></tr>
 * <tr><td><code>localRepository</code></td>   <td></td>

/**
 * The Exception class throw by the {@link Lookup} service.
 *
 * @since 4.0.0
 */
@Experimental
public class LookupException extends MavenException {

    public LookupException(String message) {
        super(message);
    }

    /**
     * @param message the message to give
     * @param e the {@link Exception}
     */
    public LookupException(String message, Exception e) {

    /**
     * @param message a message
     * @deprecated use {@link #ArtifactMetadataRetrievalException(String, Throwable, Artifact)}
     */
    @Deprecated
    public ArtifactMetadataRetrievalException(String message) {
        super(message, null, null);
    }

    /**
     * @param cause a cause
     * @deprecated use {@link #ArtifactMetadataRetrievalException(String, Throwable, Artifact)}
     */
    @Deprecated

        this.pluginDescriptor = pluginDescriptor;
        this.originalMessage = originalMessage;
    }

    /**
     * Ctor left for binary compatibility.
     *
     * @deprecated Use {@link #PluginConfigurationException(PluginDescriptor, String, Throwable)}
     */
    @Deprecated
    public PluginConfigurationException(

    /**
     * Returns the plugin context for mojo being executed and the specified
     * {@link Project}, never returns {@code null} as if context not present, creates it.
     *
     * <strong>Implementation note:</strong> while this method return type is {@link Map}, the
     * returned map instance implements {@link java.util.concurrent.ConcurrentMap} as well.
     *

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**
 * Access to {@link Type} registry.
 *
 * @since 4.0.0
 */
@Experimental
public interface TypeRegistry extends ExtensibleEnumRegistry<Type> {

    /**
     * Obtain the {@link Type} from the specified {@code id}.
     * If no type is known for {@code id}, the registry will
     * create a custom {@code Type} for it.