diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
index 6a0da41..450760f 100644
--- a/.settings/org.eclipse.jdt.core.prefs
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -10,6 +10,15 @@ org.eclipse.jdt.core.codeComplete.staticFieldPrefixes=
 org.eclipse.jdt.core.codeComplete.staticFieldSuffixes=
 org.eclipse.jdt.core.codeComplete.staticFinalFieldPrefixes=
 org.eclipse.jdt.core.codeComplete.staticFinalFieldSuffixes=
+org.eclipse.jdt.core.compiler.annotation.inheritNullAnnotations=disabled
+org.eclipse.jdt.core.compiler.annotation.missingNonNullByDefaultAnnotation=ignore
+org.eclipse.jdt.core.compiler.annotation.nonnull=org.eclipse.jdt.annotation.NonNull
+org.eclipse.jdt.core.compiler.annotation.nonnull.secondary=
+org.eclipse.jdt.core.compiler.annotation.nonnullbydefault=org.eclipse.jdt.annotation.NonNullByDefault
+org.eclipse.jdt.core.compiler.annotation.nonnullbydefault.secondary=
+org.eclipse.jdt.core.compiler.annotation.nullable=org.eclipse.jdt.annotation.Nullable
+org.eclipse.jdt.core.compiler.annotation.nullable.secondary=
+org.eclipse.jdt.core.compiler.annotation.nullanalysis=disabled
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
@@ -17,15 +26,19 @@ org.eclipse.jdt.core.compiler.compliance=1.8
 org.eclipse.jdt.core.compiler.debug.lineNumber=generate
 org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.APILeak=warning
 org.eclipse.jdt.core.compiler.problem.annotationSuperInterface=warning
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.autoboxing=ignore
+org.eclipse.jdt.core.compiler.problem.comparingIdentical=warning
+org.eclipse.jdt.core.compiler.problem.deadCode=warning
 org.eclipse.jdt.core.compiler.problem.deprecation=warning
 org.eclipse.jdt.core.compiler.problem.deprecationInDeprecatedCode=disabled
 org.eclipse.jdt.core.compiler.problem.deprecationWhenOverridingDeprecatedMethod=disabled
 org.eclipse.jdt.core.compiler.problem.discouragedReference=warning
 org.eclipse.jdt.core.compiler.problem.emptyStatement=ignore
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.explicitlyClosedAutoCloseable=ignore
 org.eclipse.jdt.core.compiler.problem.fallthroughCase=ignore
 org.eclipse.jdt.core.compiler.problem.fatalOptionalError=enabled
 org.eclipse.jdt.core.compiler.problem.fieldHiding=ignore
@@ -33,45 +46,77 @@ org.eclipse.jdt.core.compiler.problem.finalParameterBound=warning
 org.eclipse.jdt.core.compiler.problem.finallyBlockNotCompletingNormally=warning
 org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
 org.eclipse.jdt.core.compiler.problem.hiddenCatchBlock=warning
+org.eclipse.jdt.core.compiler.problem.includeNullInfoFromAsserts=disabled
 org.eclipse.jdt.core.compiler.problem.incompatibleNonInheritedInterfaceMethod=warning
 org.eclipse.jdt.core.compiler.problem.incompleteEnumSwitch=ignore
 org.eclipse.jdt.core.compiler.problem.indirectStaticAccess=ignore
 org.eclipse.jdt.core.compiler.problem.localVariableHiding=ignore
 org.eclipse.jdt.core.compiler.problem.methodWithConstructorName=warning
+org.eclipse.jdt.core.compiler.problem.missingDefaultCase=ignore
 org.eclipse.jdt.core.compiler.problem.missingDeprecatedAnnotation=ignore
+org.eclipse.jdt.core.compiler.problem.missingEnumCaseDespiteDefault=disabled
+org.eclipse.jdt.core.compiler.problem.missingHashCodeMethod=ignore
 org.eclipse.jdt.core.compiler.problem.missingOverrideAnnotation=ignore
+org.eclipse.jdt.core.compiler.problem.missingOverrideAnnotationForInterfaceMethodImplementation=enabled
 org.eclipse.jdt.core.compiler.problem.missingSerialVersion=warning
+org.eclipse.jdt.core.compiler.problem.missingSynchronizedOnInheritedMethod=ignore
 org.eclipse.jdt.core.compiler.problem.noEffectAssignment=warning
 org.eclipse.jdt.core.compiler.problem.noImplicitStringConversion=warning
 org.eclipse.jdt.core.compiler.problem.nonExternalizedStringLiteral=ignore
+org.eclipse.jdt.core.compiler.problem.nonnullParameterAnnotationDropped=warning
+org.eclipse.jdt.core.compiler.problem.nonnullTypeVariableFromLegacyInvocation=warning
+org.eclipse.jdt.core.compiler.problem.nullAnnotationInferenceConflict=error
 org.eclipse.jdt.core.compiler.problem.nullReference=ignore
+org.eclipse.jdt.core.compiler.problem.nullSpecViolation=error
+org.eclipse.jdt.core.compiler.problem.nullUncheckedConversion=warning
 org.eclipse.jdt.core.compiler.problem.overridingPackageDefaultMethod=warning
 org.eclipse.jdt.core.compiler.problem.parameterAssignment=ignore
+org.eclipse.jdt.core.compiler.problem.pessimisticNullAnalysisForFreeTypeVariables=warning
 org.eclipse.jdt.core.compiler.problem.possibleAccidentalBooleanAssignment=ignore
 org.eclipse.jdt.core.compiler.problem.potentialNullReference=ignore
-org.eclipse.jdt.core.compiler.problem.rawTypeReference=ignore
+org.eclipse.jdt.core.compiler.problem.potentiallyUnclosedCloseable=ignore
+org.eclipse.jdt.core.compiler.problem.rawTypeReference=warning
+org.eclipse.jdt.core.compiler.problem.redundantNullAnnotation=warning
 org.eclipse.jdt.core.compiler.problem.redundantNullCheck=ignore
+org.eclipse.jdt.core.compiler.problem.redundantSpecificationOfTypeArguments=warning
+org.eclipse.jdt.core.compiler.problem.redundantSuperinterface=ignore
+org.eclipse.jdt.core.compiler.problem.reportMethodCanBePotentiallyStatic=ignore
+org.eclipse.jdt.core.compiler.problem.reportMethodCanBeStatic=ignore
 org.eclipse.jdt.core.compiler.problem.specialParameterHidingField=disabled
 org.eclipse.jdt.core.compiler.problem.staticAccessReceiver=warning
+org.eclipse.jdt.core.compiler.problem.suppressOptionalErrors=disabled
 org.eclipse.jdt.core.compiler.problem.suppressWarnings=enabled
+org.eclipse.jdt.core.compiler.problem.syntacticNullAnalysisForFields=disabled
 org.eclipse.jdt.core.compiler.problem.syntheticAccessEmulation=ignore
+org.eclipse.jdt.core.compiler.problem.terminalDeprecation=warning
 org.eclipse.jdt.core.compiler.problem.typeParameterHiding=warning
-org.eclipse.jdt.core.compiler.problem.uncheckedTypeOperation=ignore
+org.eclipse.jdt.core.compiler.problem.unavoidableGenericTypeProblems=enabled
+org.eclipse.jdt.core.compiler.problem.uncheckedTypeOperation=warning
+org.eclipse.jdt.core.compiler.problem.unclosedCloseable=warning
 org.eclipse.jdt.core.compiler.problem.undocumentedEmptyBlock=ignore
 org.eclipse.jdt.core.compiler.problem.unhandledWarningToken=warning
+org.eclipse.jdt.core.compiler.problem.unlikelyCollectionMethodArgumentType=warning
+org.eclipse.jdt.core.compiler.problem.unlikelyCollectionMethodArgumentTypeStrict=disabled
+org.eclipse.jdt.core.compiler.problem.unlikelyEqualsArgumentType=info
 org.eclipse.jdt.core.compiler.problem.unnecessaryElse=ignore
 org.eclipse.jdt.core.compiler.problem.unnecessaryTypeCheck=ignore
 org.eclipse.jdt.core.compiler.problem.unqualifiedFieldAccess=ignore
 org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownException=ignore
+org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownExceptionExemptExceptionAndThrowable=enabled
+org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownExceptionIncludeDocCommentReference=enabled
 org.eclipse.jdt.core.compiler.problem.unusedDeclaredThrownExceptionWhenOverriding=disabled
+org.eclipse.jdt.core.compiler.problem.unusedExceptionParameter=ignore
 org.eclipse.jdt.core.compiler.problem.unusedImport=warning
 org.eclipse.jdt.core.compiler.problem.unusedLabel=warning
 org.eclipse.jdt.core.compiler.problem.unusedLocal=warning
+org.eclipse.jdt.core.compiler.problem.unusedObjectAllocation=ignore
 org.eclipse.jdt.core.compiler.problem.unusedParameter=ignore
 org.eclipse.jdt.core.compiler.problem.unusedParameterIncludeDocCommentReference=enabled
 org.eclipse.jdt.core.compiler.problem.unusedParameterWhenImplementingAbstract=disabled
 org.eclipse.jdt.core.compiler.problem.unusedParameterWhenOverridingConcrete=disabled
 org.eclipse.jdt.core.compiler.problem.unusedPrivateMember=warning
+org.eclipse.jdt.core.compiler.problem.unusedTypeParameter=ignore
+org.eclipse.jdt.core.compiler.problem.unusedWarningToken=warning
 org.eclipse.jdt.core.compiler.problem.varargsArgumentNeedCast=warning
 org.eclipse.jdt.core.compiler.source=1.8
 org.eclipse.jdt.core.formatter.align_fields_grouping_blank_lines=2147483647
diff --git a/pom.xml b/pom.xml
index 3999a73..9e2f348 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,10 +30,29 @@
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
 
+        <mda.version>0.9.2</mda.version>
+        <java-support.version>7.3.0</java-support.version>
+        <spring-extensions.version>5.3.0</spring-extensions.version>
+
         <springfox-version>2.7.0</springfox-version>
     </properties>
 
     <dependencies>
+
+        <!-- Compile dependencies -->
+        <dependency>
+            <groupId>net.shibboleth.metadata</groupId>
+            <artifactId>aggregator-pipeline</artifactId>
+            <version>${mda.version}</version>
+        </dependency>
+        <!--
+        <dependency>
+            <groupId>net.shibboleth.utilities</groupId>
+            <artifactId>java-support</artifactId>
+            <version>${java-support.version}</version>
+        </dependency>
+        -->
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
@@ -62,6 +81,16 @@
             <groupId>javax.validation</groupId>
             <artifactId>validation-api</artifactId>
         </dependency>
+
+        <!-- Runtime dependencies -->
+
+        <dependency>
+            <groupId>net.shibboleth.ext</groupId>
+            <artifactId>spring-extensions</artifactId>
+            <version>${spring-extensions.version}</version>
+            <scope>runtime</scope>
+        </dependency>
+
     </dependencies>
 
     <build>
@@ -196,6 +225,16 @@
         </profile>
     </profiles>
 
+    <repositories>
+        <repository>
+            <id>shib-release</id>
+            <url>https://build.shibboleth.net/nexus/content/groups/public</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+
     <developers>
         <developer>
             <id>iay</id>
diff --git a/src/main/java/uk/org/iay/incommon/validator/api/ValidatorsApiController.java b/src/main/java/uk/org/iay/incommon/validator/api/ValidatorsApiController.java
index 3f747e0..1379180 100644
--- a/src/main/java/uk/org/iay/incommon/validator/api/ValidatorsApiController.java
+++ b/src/main/java/uk/org/iay/incommon/validator/api/ValidatorsApiController.java
@@ -30,8 +30,12 @@
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestBody;
+import org.w3c.dom.Element;
 
 import io.swagger.annotations.ApiParam;
+import net.shibboleth.metadata.Item;
+import net.shibboleth.metadata.pipeline.Pipeline;
+import net.shibboleth.metadata.pipeline.PipelineProcessingException;
 import uk.org.iay.incommon.validator.context.ValidatorCollection;
 import uk.org.iay.incommon.validator.models.Status;
 import uk.org.iay.incommon.validator.models.Status.StatusEnum;
@@ -68,7 +72,7 @@ public ResponseEntity<List<Validator>> getValidators() {
             v.setDescription(entry.getDescription());
             validators.add(v);
         }
-        return new ResponseEntity<List<Validator>>(validators, HttpStatus.OK);
+        return new ResponseEntity<>(validators, HttpStatus.OK);
     }
 
     /**
@@ -82,6 +86,8 @@ public ResponseEntity<List<Validator>> getValidators() {
     private Status makeStatus(final StatusEnum status, final String componentId, final String message) {
         final Status s = new Status();
         s.setStatus(status);
+        s.setComponentId(componentId);
+        s.setMessage(message);
         return s;
     }
 
@@ -99,10 +105,19 @@ public ResponseEntity<List<Status>> validate(
             throw new NotFoundException("unknown validator identifier '" + validatorId + "'");
         }
 
+        // Run the validator.
+        final List<Item<Element>> items = new ArrayList<>();
+        final Pipeline<Element> pipeline = entry.getPipeline();
+        try {
+            pipeline.execute(items);
+        } catch (final PipelineProcessingException e) {
+            e.printStackTrace();
+        }
+
         final List<Status> statuses = new ArrayList<>();
         statuses.add(makeStatus(StatusEnum.ERROR, "component", "message"));
         statuses.add(makeStatus(StatusEnum.WARNING, "component/sub", "another message"));
-        return new ResponseEntity<List<Status>>(statuses, HttpStatus.NOT_IMPLEMENTED);
+        return new ResponseEntity<>(statuses, HttpStatus.OK);
     }
 
     /**
diff --git a/src/main/java/uk/org/iay/incommon/validator/context/ValidatorCollection.java b/src/main/java/uk/org/iay/incommon/validator/context/ValidatorCollection.java
index 310a302..ee9048e 100644
--- a/src/main/java/uk/org/iay/incommon/validator/context/ValidatorCollection.java
+++ b/src/main/java/uk/org/iay/incommon/validator/context/ValidatorCollection.java
@@ -23,6 +23,9 @@
 import org.slf4j.LoggerFactory;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;
+import org.w3c.dom.Element;
+
+import net.shibboleth.metadata.pipeline.Pipeline;
 
 /**
  * Represents a collection of validators.
@@ -40,6 +43,9 @@ public static class Entry {
         /** Description for the validator. */
         private final String description;
 
+        /** Pipeline for the validator. */
+        private final Pipeline<Element> pipeline;
+
         /**
          * Constructor.
          *
@@ -48,6 +54,10 @@ public static class Entry {
         public Entry(final ApplicationContext ctx) {
             id = ctx.getBean("id", String.class);
             description = ctx.getBean("description", String.class);
+
+            @SuppressWarnings("unchecked")
+            final Pipeline<Element> pipe = ctx.getBean("pipeline", Pipeline.class);
+            pipeline = pipe;
         }
 
         /**
@@ -68,6 +78,14 @@ public String getDescription() {
             return description;
         }
 
+        /**
+         * Gets the validator's pipeline.
+         *
+         * @return the validator's pipeline
+         */
+        public Pipeline<Element> getPipeline() {
+            return pipeline;
+        }
     }
 
     /** Class logger. */
diff --git a/src/main/resources/common-beans.xml b/src/main/resources/common-beans.xml
index 327989f..3d1c297 100644
--- a/src/main/resources/common-beans.xml
+++ b/src/main/resources/common-beans.xml
@@ -14,4 +14,27 @@
         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
 
+    <!--
+        Pick up Shibboleth MDA beans.
+    -->
+    <import resource="mda-beans.xml"/>
+
+    <!-- *** Default Shibboleth component bean id property from Spring bean id *** -->
+    <bean class="net.shibboleth.ext.spring.config.IdentifiableBeanPostProcessor" lazy-init="false"/>
+
+    <!--
+        ***********************************
+        ***                             ***
+        ***   P A R E N T   B E A N S   ***
+        ***                             ***
+        ***********************************
+    -->
+
+    <!--
+        Java class parent shorthand beans.
+    -->
+    <bean id="File" abstract="true" class="java.io.File"/>
+    <bean id="String" abstract="true" class="java.lang.String"/>
+    <bean id="QName" abstract="true" class="javax.xml.namespace.QName"/>
+
 </beans>
diff --git a/src/main/resources/default-validator.xml b/src/main/resources/default-validator.xml
index 5a85ecd..ecd9c94 100644
--- a/src/main/resources/default-validator.xml
+++ b/src/main/resources/default-validator.xml
@@ -9,7 +9,13 @@
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
 
-    <bean id="id" class="java.lang.String" c:_="default"/>
-    <bean id="description" class="java.lang.String" c:_="Default validator."/>
+    <!-- *** Default Shibboleth component bean id property from Spring bean id *** -->
+    <bean class="net.shibboleth.ext.spring.config.IdentifiableBeanPostProcessor" lazy-init="false"/>
+
+    <bean id="id" parent="String" c:_="default"/>
+    <bean id="description" parent="String" c:_="Default validator."/>
+
+    <bean id="pipeline" parent="mda.SimplePipeline">
+    </bean>
 
 </beans>
diff --git a/src/main/resources/mda-beans.xml b/src/main/resources/mda-beans.xml
new file mode 100644
index 0000000..ea59208
--- /dev/null
+++ b/src/main/resources/mda-beans.xml
@@ -0,0 +1,272 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+    xmlns:context="http://www.springframework.org/schema/context"
+    xmlns:util="http://www.springframework.org/schema/util"
+    xmlns:p="http://www.springframework.org/schema/p"
+    xmlns:c="http://www.springframework.org/schema/c"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="
+        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
+        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
+        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
+
+    <!--
+        Bean definitions for simplified access to components in the
+        Shibboleth Metadata Aggregator's aggregator-pipeline artifact.
+
+        All defined bean names are prefixed with "mda.".
+    -->
+
+    <!--
+        Parent for anything based on the Shibboleth component system.
+        These all require initialization before use.
+    -->
+    <bean id="mda.component_parent" abstract="true"
+        init-method="initialize" destroy-method="destroy"/>
+
+    <!--
+        Parent for all stages.
+    -->
+    <bean id="mda.stage_parent" abstract="true" parent="mda.component_parent"/>
+
+    <!--
+        net.shibboleth.metadata
+    -->
+
+    <bean id="mda.DeduplicatingItemIdMergeStrategy" abstract="true"
+        class="net.shibboleth.metadata.DeduplicatingItemIdMergeStrategy"/>
+
+    <bean id="mda.FirstItemIdItemIdentificationStrategy" abstract="true"
+        class="net.shibboleth.metadata.FirstItemIdItemIdentificationStrategy"/>
+
+    <bean id="mda.SimpleCollectionMergeStrategy" abstract="true"
+        class="net.shibboleth.metadata.SimpleCollectionMergeStrategy"/>
+
+    <bean id="mda.SimpleItemCollectionSerializer" abstract="true"
+        class="net.shibboleth.metadata.SimpleItemCollectionSerializer"/>
+
+    <!--
+        net.shibboleth.metadata.dom
+    -->
+
+    <bean id="mda.CRDetectionStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.CRDetectionStage"/>
+
+    <bean id="mda.DOMElementSerializer" abstract="true"
+        class="net.shibboleth.metadata.dom.DOMElementSerializer"/>
+
+    <bean id="mda.DOMFilesystemSourceStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.DOMFilesystemSourceStage"/>
+
+    <bean id="mda.DOMResourceSourceStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.DOMResourceSourceStage"/>
+
+    <bean id="mda.ElementStrippingStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.ElementStrippingStage"/>
+
+    <bean id="mda.ElementWhitespaceTrimmingStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.ElementWhitespaceTrimmingStage"/>
+
+    <bean id="mda.EmptyContainerStrippingStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.EmptyContainerStrippingStage"/>
+
+    <bean id="mda.MultiOutputXSLTransformationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.MultiOutputXSLTransformationStage"/>
+
+    <bean id="mda.NamespacesStrippingStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.NamespacesStrippingStage"/>
+
+    <bean id="mda.NamespaceStrippingStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.NamespaceStrippingStage"/>
+
+    <bean id="mda.XMLSchemaValidationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.XMLSchemaValidationStage"/>
+
+    <bean id="mda.XMLSignatureSigningStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.XMLSignatureSigningStage"/>
+
+    <bean id="mda.XMLSignatureValidationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.XMLSignatureValidationStage"/>
+
+    <bean id="mda.XPathFilteringStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.XPathFilteringStage"/>
+
+    <bean id="mda.XPathItemSelectionStrategy" abstract="true"
+        class="net.shibboleth.metadata.dom.XPathItemSelectionStrategy"/>
+
+    <bean id="mda.XSLTransformationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.XSLTransformationStage"/>
+
+    <bean id="mda.XSLValidationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.XSLValidationStage"/>
+
+    <!--
+        net.shibboleth.metadata.dom.ds
+    -->
+
+    <bean id="mda.X509ValidationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.ds.X509ValidationStage"/>
+
+    <!--
+        net.shibboleth.metadata.dom.saml
+    -->
+
+    <bean id="mda.ContactPersonFilterStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.ContactPersonFilterStage"/>
+
+    <bean id="mda.EntitiesDescriptorAssemblerStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.EntitiesDescriptorAssemblerStage"/>
+
+    <bean id="mda.EntitiesDescriptorDisassemblerStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.EntitiesDescriptorDisassemblerStage"/>
+
+    <bean id="mda.EntityDescriptorItemIdPopulationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.EntityDescriptorItemIdPopulationStage"/>
+
+    <bean id="mda.EntityFilterStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.EntityFilterStage"/>
+
+    <bean id="mda.EntityRoleFilterStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.EntityRoleFilterStage"/>
+
+    <bean id="mda.GenerateIdStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.GenerateIdStage"/>
+
+    <bean id="mda.PullUpCacheDurationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.PullUpCacheDurationStage"/>
+
+    <bean id="mda.PullUpValidUntilStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.PullUpValidUntilStage"/>
+
+    <bean id="mda.RemoveOrganizationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.RemoveOrganizationStage"/>
+
+    <bean id="mda.SetCacheDurationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.SetCacheDurationStage"/>
+
+    <bean id="mda.SetValidUntilStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.SetValidUntilStage"/>
+
+    <bean id="mda.ValidateValidUntilStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.ValidateValidUntilStage"/>
+
+    <!--
+        net.shibboleth.metadata.dom.saml.mdattr
+    -->
+
+    <bean id="mda.EntityAttributeFilteringStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.mdattr.EntityAttributeFilteringStage"/>
+
+    <bean id="mda.EntityCategoryMatcher" abstract="true"
+        class="net.shibboleth.metadata.dom.saml.mdattr.EntityCategoryMatcher"/>
+
+    <bean id="mda.EntityCategorySupportMatcher" abstract="true"
+        class="net.shibboleth.metadata.dom.saml.mdattr.EntityCategorySupportMatcher"/>
+
+    <bean id="mda.MultiPredicateMatcher" abstract="true"
+        class="net.shibboleth.metadata.dom.saml.mdattr.MultiPredicateMatcher"/>
+
+    <bean id="mda.RegistrationAuthorityMatcher" abstract="true"
+        class="net.shibboleth.metadata.dom.saml.mdattr.RegistrationAuthorityMatcher"/>
+
+    <!--
+        net.shibboleth.metadata.dom.saml.mdrpi
+    -->
+
+    <bean id="mda.EntityRegistrationAuthorityFilterStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.mdrpi.EntityRegistrationAuthorityFilterStage"/>
+
+    <bean id="mda.RegistrationAuthorityItemIdentificationStrategy" abstract="true"
+        class="net.shibboleth.metadata.dom.saml.mdrpi.RegistrationAuthorityItemIdentificationStrategy"/>
+
+    <bean id="mda.RegistrationAuthorityPopulationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.dom.saml.mdrpi.RegistrationAuthorityPopulationStage"/>
+
+    <!--
+        net.shibboleth.metadata.pipeline
+    -->
+
+    <bean id="mda.AtLeastCollectionPredicate" abstract="true"
+        class="net.shibboleth.metadata.pipeline.AtLeastCollectionPredicate"/>
+
+    <bean id="mda.CompositeStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.CompositeStage"/>
+
+    <bean id="mda.FilesInDirectoryMultiOutputStrategy" abstract="true" parent="mda.component_parent"
+        class="net.shibboleth.metadata.pipeline.FilesInDirectoryMultiOutputStrategy"/>
+
+    <bean id="mda.ItemIdTransformStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.ItemIdTransformStage"/>
+
+    <bean id="mda.ItemMetadataAddingStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.ItemMetadataAddingStage"/>
+
+    <bean id="mda.ItemMetadataFilterStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.ItemMetadataFilterStage"/>
+
+    <bean id="mda.ItemMetadataTerminationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.ItemMetadataTerminationStage"/>
+
+    <bean id="mda.MDQueryMD5ItemIdTransformer" abstract="true"
+        class="net.shibboleth.metadata.pipeline.MDQueryMD5ItemIdTransformer"/>
+
+    <bean id="mda.MDQuerySHA1ItemIdTransformer" abstract="true"
+        class="net.shibboleth.metadata.pipeline.MDQuerySHA1ItemIdTransformer"/>
+
+    <bean id="mda.MultiOutputSerializationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.MultiOutputSerializationStage"/>
+
+    <bean id="mda.PipelineDemultiplexerStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.PipelineDemultiplexerStage"/>
+
+    <bean id="mda.PipelineMergeStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.PipelineMergeStage"/>
+
+    <bean id="mda.ScriptletStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.ScriptletStage"/>
+
+    <bean id="mda.SerializationStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.SerializationStage"/>
+
+    <bean id="mda.SimplePipeline" abstract="true" parent="mda.component_parent"
+        class="net.shibboleth.metadata.pipeline.SimplePipeline"/>
+
+    <bean id="mda.SplitMergeStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.SplitMergeStage"/>
+
+    <bean id="mda.StaticItemSourceStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.StaticItemSourceStage"/>
+
+    <bean id="mda.StatusMetadataLoggingStage" abstract="true" parent="mda.stage_parent"
+        class="net.shibboleth.metadata.pipeline.StatusMetadataLoggingStage"/>
+
+    <!--
+        net.shibboleth.metadata.util
+    -->
+
+    <bean id="mda.PathSegmentStringTransformer" abstract="true"
+        class="net.shibboleth.metadata.util.PathSegmentStringTransformer"/>
+
+    <bean id="mda.SHA1StringTransformer" abstract="true"
+        class="net.shibboleth.metadata.util.SHA1StringTransformer"/>
+
+    <!--
+        net.shibboleth.metadata.validate
+    -->
+
+    <bean id="mda.validator_parent" abstract="true" parent="mda.component_parent"/>
+
+    <!--
+        net.shibboleth.metadata.validate.x509
+    -->
+
+    <bean id="mda.X509RSAExponentValidator" abstract="true" parent="mda.validator_parent"
+        class="net.shibboleth.metadata.validate.x509.X509RSAExponentValidator"/>
+
+    <bean id="mda.X509RSAKeyLengthValidator" abstract="true" parent="mda.validator_parent"
+        class="net.shibboleth.metadata.validate.x509.X509RSAKeyLengthValidator"/>
+
+    <bean id="mda.X509RSAOpenSSLBlacklistValidator" abstract="true" parent="mda.validator_parent"
+        class="net.shibboleth.metadata.validate.x509.X509RSAOpenSSLBlacklistValidator"/>
+
+</beans>
diff --git a/src/main/resources/second-validator.xml b/src/main/resources/second-validator.xml
index 2efb5e9..ce9b313 100644
--- a/src/main/resources/second-validator.xml
+++ b/src/main/resources/second-validator.xml
@@ -9,7 +9,13 @@
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
 
-    <bean id="id" class="java.lang.String" c:_="second"/>
-    <bean id="description" class="java.lang.String" c:_="Second validator."/>
+    <!-- *** Default Shibboleth component bean id property from Spring bean id *** -->
+    <bean class="net.shibboleth.ext.spring.config.IdentifiableBeanPostProcessor" lazy-init="false"/>
+
+    <bean id="id" parent="String" c:_="second"/>
+    <bean id="description" parent="String" c:_="Second validator."/>
+
+    <bean id="pipeline" parent="mda.SimplePipeline">
+    </bean>
 
 </beans>
diff --git a/src/main/resources/test-validator.xml b/src/main/resources/test-validator.xml
index 569bdab..9711a43 100644
--- a/src/main/resources/test-validator.xml
+++ b/src/main/resources/test-validator.xml
@@ -9,7 +9,13 @@
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
     http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
 
-    <bean id="id" class="java.lang.String" c:_="test"/>
-    <bean id="description" class="java.lang.String" c:_="Test validator."/>
+    <!-- *** Default Shibboleth component bean id property from Spring bean id *** -->
+    <bean class="net.shibboleth.ext.spring.config.IdentifiableBeanPostProcessor" lazy-init="false"/>
+
+    <bean id="id" parent="String" c:_="test"/>
+    <bean id="description" parent="String" c:_="Test validator."/>
+
+    <bean id="pipeline" parent="mda.SimplePipeline">
+    </bean>
 
 </beans>