// ErrPrimaryKeyRequired primary keys required
	ErrPrimaryKeyRequired = errors.New("primary key required")
	// ErrModelValueRequired model value required
	ErrModelValueRequired = errors.New("model value required")
	// ErrModelAccessibleFieldsRequired model accessible fields required
	ErrModelAccessibleFieldsRequired = errors.New("model accessible fields required")
	// ErrSubQueryRequired sub query required
	ErrSubQueryRequired = errors.New("sub query required")

  <packaging>pom</packaging>

  <name>Maven Compatibility Modules</name>

  <modules>
    <module>maven-plugin-api</module>
    <module>maven-builder-support</module>
    <module>maven-model</module>
    <module>maven-model-builder</module>
    <module>maven-settings</module>
    <module>maven-settings-builder</module>
    <module>maven-artifact</module>
    <module>maven-resolver-provider</module>

### Модель для входа { #model-for-input }

Если использовать эту модель как входную, как здесь:

{* ../../docs_src/separate_openapi_schemas/tutorial001_py310.py ln[1:15] hl[14] *}

…то поле `description` **не будет обязательным**, потому что у него значение по умолчанию `None`.

### Входная модель в документации { #input-model-in-docs }

 * 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

        /**
         * Project model properties. These properties are defined in the project's POM file (pom.xml) and
         * are read from the project model during the build. They represent build-time configuration that
         * is specific to the project and is stored with the project definition itself rather than in
         * external configuration.
         */
        MODEL
    }

 * limitations under the License.
 */

package gradlebuild.docs.dsl.docbook;

import gradlebuild.docs.dsl.docbook.model.ClassDoc;
import gradlebuild.docs.dsl.docbook.model.ExtraAttributeDoc;
import gradlebuild.docs.dsl.docbook.model.PropertyDoc;
import gradlebuild.docs.dsl.source.model.PropertyMetaData;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
import org.gradle.api.logging.Logger;

import org.apache.maven.artifact.repository.metadata.Metadata;
import org.apache.maven.artifact.repository.metadata.io.MetadataReader;
import org.apache.maven.model.Build;
import org.apache.maven.model.Model;
import org.apache.maven.model.Plugin;
import org.apache.maven.model.PluginManagement;
import org.apache.maven.plugin.BuildPluginManager;
import org.apache.maven.plugin.descriptor.PluginDescriptor;

 * under the License.
 */
package org.apache.maven.profiles.activation;

import java.util.Properties;

import org.apache.maven.model.Activation;
import org.apache.maven.model.ActivationProperty;
import org.apache.maven.model.Profile;
import org.codehaus.plexus.context.Context;
import org.codehaus.plexus.context.ContextException;

        <artifactId>modello-maven-plugin</artifactId>
        <configuration>
          <version>1.2.0</version>
          <models>
            <model>src/main/mdo/core-extensions.mdo</model>
          </models>
          <templates>
            <template>model.vm</template>
          </templates>
          <params>
            <param>locationTracking=true</param>
            <param>generateLocationClasses=true</param>

    //
    // p4 inherits from p3
    // p3 inherits from p2
    // p2 inherits from p1
    // p1 inherits from p0
    // p0 inherits from super model
    //
    // or we can show it graphically as:
    //
    // p4 ---> p3 ---> p2 ---> p1 ---> p0 --> super model
    //
    // ----------------------------------------------------------------------

    @Test
    void testProjectInheritance() throws Exception {