diff --git a/dataforge-meta/api/dataforge-meta.api b/dataforge-meta/api/dataforge-meta.api
index f946f881..031cb33d 100644
--- a/dataforge-meta/api/dataforge-meta.api
+++ b/dataforge-meta/api/dataforge-meta.api
@@ -38,15 +38,8 @@ public final class hep/dataforge/meta/ConfigKt {
 	public static final fun get (Lhep/dataforge/meta/Config;Lhep/dataforge/names/NameToken;)Lhep/dataforge/meta/MetaItem;
 }
 
-public abstract interface class hep/dataforge/meta/Configurable : hep/dataforge/meta/MutableItemProvider {
+public abstract interface class hep/dataforge/meta/Configurable {
 	public abstract fun getConfig ()Lhep/dataforge/meta/Config;
-	public abstract fun getItem (Lhep/dataforge/names/Name;)Lhep/dataforge/meta/MetaItem;
-	public abstract fun setItem (Lhep/dataforge/names/Name;Lhep/dataforge/meta/MetaItem;)V
-}
-
-public final class hep/dataforge/meta/Configurable$DefaultImpls {
-	public static fun getItem (Lhep/dataforge/meta/Configurable;Lhep/dataforge/names/Name;)Lhep/dataforge/meta/MetaItem;
-	public static fun setItem (Lhep/dataforge/meta/Configurable;Lhep/dataforge/names/Name;Lhep/dataforge/meta/MetaItem;)V
 }
 
 public final class hep/dataforge/meta/ConfigurableKt {
@@ -414,10 +407,8 @@ public final class hep/dataforge/meta/MutableItemDelegateKt {
 	public static final fun stringList (Lhep/dataforge/meta/MutableItemProvider;[Ljava/lang/String;Lhep/dataforge/names/Name;)Lkotlin/properties/ReadWriteProperty;
 	public static synthetic fun stringList$default (Lhep/dataforge/meta/MutableItemProvider;Lhep/dataforge/names/Name;ILjava/lang/Object;)Lkotlin/properties/ReadWriteProperty;
 	public static synthetic fun stringList$default (Lhep/dataforge/meta/MutableItemProvider;[Ljava/lang/String;Lhep/dataforge/names/Name;ILjava/lang/Object;)Lkotlin/properties/ReadWriteProperty;
-	public static final fun value (Lhep/dataforge/meta/Configurable;Lhep/dataforge/names/Name;)Lkotlin/properties/ReadWriteProperty;
 	public static final fun value (Lhep/dataforge/meta/MutableItemProvider;Lhep/dataforge/names/Name;)Lkotlin/properties/ReadWriteProperty;
 	public static final fun value (Lhep/dataforge/meta/MutableItemProvider;Lhep/dataforge/names/Name;Lkotlin/jvm/functions/Function0;)Lkotlin/properties/ReadWriteProperty;
-	public static synthetic fun value$default (Lhep/dataforge/meta/Configurable;Lhep/dataforge/names/Name;ILjava/lang/Object;)Lkotlin/properties/ReadWriteProperty;
 	public static synthetic fun value$default (Lhep/dataforge/meta/MutableItemProvider;Lhep/dataforge/names/Name;ILjava/lang/Object;)Lkotlin/properties/ReadWriteProperty;
 	public static synthetic fun value$default (Lhep/dataforge/meta/MutableItemProvider;Lhep/dataforge/names/Name;Lkotlin/jvm/functions/Function0;ILjava/lang/Object;)Lkotlin/properties/ReadWriteProperty;
 }
@@ -475,15 +466,15 @@ public final class hep/dataforge/meta/ObservableMeta$DefaultImpls {
 	public static fun toMeta (Lhep/dataforge/meta/ObservableMeta;)Lhep/dataforge/meta/Meta;
 }
 
-public class hep/dataforge/meta/Scheme : hep/dataforge/meta/Configurable, hep/dataforge/meta/MetaRepr, hep/dataforge/meta/descriptors/Described {
+public class hep/dataforge/meta/Scheme : hep/dataforge/meta/Configurable, hep/dataforge/meta/MetaRepr, hep/dataforge/meta/MutableItemProvider, hep/dataforge/meta/descriptors/Described {
 	public fun <init> ()V
 	public fun <init> (Lhep/dataforge/meta/Config;Lhep/dataforge/meta/ItemProvider;Lhep/dataforge/meta/descriptors/NodeDescriptor;)V
 	public synthetic fun <init> (Lhep/dataforge/meta/Config;Lhep/dataforge/meta/ItemProvider;Lhep/dataforge/meta/descriptors/NodeDescriptor;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
-	public final fun getConfig ()Lhep/dataforge/meta/Config;
+	public fun getConfig ()Lhep/dataforge/meta/Config;
 	public final fun getDefaultItem (Lhep/dataforge/names/Name;)Lhep/dataforge/meta/MetaItem;
 	public fun getDefaultLayer ()Lhep/dataforge/meta/Meta;
 	public synthetic fun getDescriptor ()Lhep/dataforge/meta/descriptors/ItemDescriptor;
-	public final fun getDescriptor ()Lhep/dataforge/meta/descriptors/NodeDescriptor;
+	public fun getDescriptor ()Lhep/dataforge/meta/descriptors/NodeDescriptor;
 	public fun getItem (Lhep/dataforge/names/Name;)Lhep/dataforge/meta/MetaItem;
 	public final fun isEmpty ()Z
 	public fun setItem (Lhep/dataforge/names/Name;Lhep/dataforge/meta/MetaItem;)V
@@ -495,8 +486,8 @@ public class hep/dataforge/meta/Scheme : hep/dataforge/meta/Configurable, hep/da
 public final class hep/dataforge/meta/SchemeKt {
 	public static final fun asScheme (Lhep/dataforge/meta/Meta;)Lhep/dataforge/meta/Scheme;
 	public static final fun invoke (Lhep/dataforge/meta/Scheme;Lkotlin/jvm/functions/Function1;)Lhep/dataforge/meta/Scheme;
-	public static final fun toScheme (Lhep/dataforge/meta/Meta;Lhep/dataforge/meta/Specification;Lkotlin/jvm/functions/Function1;)Lhep/dataforge/meta/Configurable;
-	public static synthetic fun toScheme$default (Lhep/dataforge/meta/Meta;Lhep/dataforge/meta/Specification;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lhep/dataforge/meta/Configurable;
+	public static final fun toScheme (Lhep/dataforge/meta/Meta;Lhep/dataforge/meta/Specification;Lkotlin/jvm/functions/Function1;)Lhep/dataforge/meta/MutableItemProvider;
+	public static synthetic fun toScheme$default (Lhep/dataforge/meta/Meta;Lhep/dataforge/meta/Specification;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)Lhep/dataforge/meta/MutableItemProvider;
 }
 
 public class hep/dataforge/meta/SchemeSpec : hep/dataforge/meta/Specification, hep/dataforge/meta/descriptors/Described {
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Configurable.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Configurable.kt
index 2308bef2..764ee1ea 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Configurable.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Configurable.kt
@@ -6,23 +6,11 @@ import kotlin.properties.ReadWriteProperty
 /**
  * A container that holds a [Config].
  */
-public interface Configurable : MutableItemProvider {
+public interface Configurable {
     /**
      * Backing config
      */
     public val config: Config
-
-    /**
-     * Get a property with default
-     */
-    override fun getItem(name: Name): MetaItem<*>? = config[name]
-
-    /**
-     * Set a configurable property
-     */
-    override fun setItem(name: Name, item: MetaItem<*>?) {
-        config.setItem(name, item)
-    }
 }
 
 
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableItemDelegate.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableItemDelegate.kt
index 4d33bea7..e7fb8446 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableItemDelegate.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableItemDelegate.kt
@@ -118,10 +118,6 @@ public inline fun <reified E : Enum<E>> MutableItemProvider.enum(
 public inline fun <reified M : MutableMeta<M>> M.node(key: Name? = null): ReadWriteProperty<Any?, M?> =
     item(key).convert(reader = { it?.let { it.node as M } }, writer = { it?.let { MetaItem.NodeItem(it) } })
 
-
-public fun Configurable.value(key: Name? = null): ReadWriteProperty<Any?, Value?> =
-    item(key).convert(MetaConverter.value)
-
 /* Number delegates */
 
 public fun MutableItemProvider.int(key: Name? = null): ReadWriteProperty<Any?, Int?> =
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Scheme.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Scheme.kt
index 7d982404..b9e777e7 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Scheme.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Scheme.kt
@@ -13,7 +13,7 @@ public open class Scheme(
     config: Config = Config(),
     internal var default: ItemProvider? = null,
     descriptor: NodeDescriptor? = null,
-) : Configurable, Described, MetaRepr {
+) : Configurable, MutableItemProvider, Described, MetaRepr {
 
     override var config: Config = config
         internal set
@@ -44,7 +44,7 @@ public open class Scheme(
      */
     override fun setItem(name: Name, item: MetaItem<*>?) {
         if (validateItem(name, item)) {
-            super.setItem(name, item)
+            config.setItem(name, item)
         } else {
             error("Validation failed for property $name with value $item")
         }
@@ -120,5 +120,5 @@ public open class SchemeSpec<T : Scheme>(
 
 public fun Meta.asScheme(): Scheme = Scheme(this.asConfig(), null, null)
 
-public fun <T : Configurable> Meta.toScheme(spec: Specification<T>, block: T.() -> Unit = {}): T =
+public fun <T : MutableItemProvider> Meta.toScheme(spec: Specification<T>, block: T.() -> Unit = {}): T =
     spec.wrap(this).apply(block)