the Maven Repository Metadata file contains 3 different sets of metadata:

 [[1]] in a "groupId" directory: a "groupId" directory may contain Maven plugins artifacts, which are described in metadata's <<<plugins>>> element,

 [[2]] in a "groupId/artifactId" directory: metadata describes <<<groupId>>>, <<<artifactId>>> and <<<versioning>>> element that
       gives data about available versions (<<<latest>>>, <<<release>>>, <<<versions>>> list and <<<lastUpdated>>>),

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.settings.building;

/**
 * Describes a problem that was encountered during settings building. A problem can either be an exception that was
 * thrown or a simple string message. In addition, a problem carries a hint about its source, e.g. the settings file

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

/**
 * Describes a problem that was encountered during project building. A problem can either be an exception that was
 * thrown or a simple string message. In addition, a problem carries a hint about its source.
 *
 * @since 4.0.0
 */

 */
package org.codelibs.core.timer;

/**
 * This is an interface for handling timeouts.
 *
 * @author higa
 *
 */
@FunctionalInterface
public interface TimeoutTarget {

    /**
     * Describes the processing for a timeout.
     */
    void expired();

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.model.building;

/**
 * Describes a problem that was encountered during model building. A problem can either be an exception that was thrown
 * or a simple string message. In addition, a problem carries a hint about its source, e.g. the POM file that exhibits

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.execution;

import org.apache.maven.artifact.versioning.ArtifactVersion;

/**
 * Describes runtime information about the application.
 *
 * @deprecated Use {@link org.apache.maven.rtinfo.RuntimeInformation} instead.
 */
@Deprecated
public interface RuntimeInformation {

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.artifact.versioning;

/**
 * Describes an artifact version in terms of its components, converts it to/from a string and
 * compares two versions.
 *
 */
public interface ArtifactVersion extends Comparable<ArtifactVersion> {
    int getMajorVersion();

import java.util.List;

import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.ProjectBuildingException;

/**
 * Describes strategies for finding projects that Maven could build.
 */
public interface ProjectCollectionStrategy {
    /**
     *
     * @param request
     * @return
     * @throws ProjectBuildingException
     */

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.plugin.version;

import org.eclipse.aether.repository.ArtifactRepository;

/**
 * Describes the result of a plugin version resolution request.
 *
 * @since 3.0
 */
public interface PluginVersionResult {

    /**
     * The resolved plugin version.
     *

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.building;

/**
 * Describes a problem that was encountered during settings building. A problem can either be an exception that was
 * thrown or a simple string message. In addition, a problem carries a hint about its source, e.g. the settings file