diff --git a/build.gradle.kts b/build.gradle.kts
index 00c7dfea..9b042061 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,19 +1,14 @@
 plugins {
-    id("scientifik.mpp") apply false
-    id("scientifik.publish") apply false
+    id("scientifik.mpp") version "0.1.4-dev" apply false
+    id("scientifik.publish") version "0.1.4-dev" apply false
 }
 
-val dataforgeVersion by extra("0.1.3-dev-9")
+val dataforgeVersion by extra("0.1.3-dev-10")
 
 val bintrayRepo by extra("dataforge")
-val vcs by extra("https://github.com/mipt-npm/dataforge-core")
+val githubProject by extra("dataforge-core")
 
 allprojects {
-    repositories {
-        jcenter()
-        maven("https://kotlin.bintray.com/kotlinx")
-    }
-
     group = "hep.dataforge"
     version = dataforgeVersion
 }
diff --git a/dataforge-context/src/commonMain/kotlin/hep/dataforge/context/Context.kt b/dataforge-context/src/commonMain/kotlin/hep/dataforge/context/Context.kt
index 9db32a01..21b8ebe6 100644
--- a/dataforge-context/src/commonMain/kotlin/hep/dataforge/context/Context.kt
+++ b/dataforge-context/src/commonMain/kotlin/hep/dataforge/context/Context.kt
@@ -149,7 +149,7 @@ object Global : Context("GLOBAL", null) {
         return contextRegistry[name]
     }
 
-    fun context(name: String, parent: Context = this, block: ContextBuilder.() -> Unit): Context =
+    fun context(name: String, parent: Context = this, block: ContextBuilder.() -> Unit = {}): Context =
         ContextBuilder(name, parent).apply(block).build()
 
 }
diff --git a/dataforge-io/build.gradle.kts b/dataforge-io/build.gradle.kts
index 6ed06857..b65783c6 100644
--- a/dataforge-io/build.gradle.kts
+++ b/dataforge-io/build.gradle.kts
@@ -2,56 +2,25 @@ plugins {
     id("scientifik.mpp")
 }
 
-description = "IO for meta"
+description = "IO module"
 
+scientifik{
+    serialization = true
+    io = true
+}
 
-val ioVersion: String = Scientifik.ioVersion
-val serializationVersion: String  = Scientifik.serializationVersion
 
 kotlin {
-    jvm()
-    js()
     sourceSets {
         val commonMain by getting{
             dependencies {
                 api(project(":dataforge-meta"))
-                //implementation 'org.jetbrains.kotlin:kotlin-reflect'
-                api("org.jetbrains.kotlinx:kotlinx-serialization-runtime-common:$serializationVersion")
-                api("org.jetbrains.kotlinx:kotlinx-io:$ioVersion")
             }
         }
-        val commonTest by getting {
-            dependencies {
-                implementation("org.jetbrains.kotlin:kotlin-test-common")
-                implementation("org.jetbrains.kotlin:kotlin-test-annotations-common")
+        val jsMain by getting{
+            dependencies{
+                api(npm("text-encoding"))
             }
         }
-        val jvmMain by getting {
-            dependencies {
-                api("org.jetbrains.kotlinx:kotlinx-serialization-runtime:$serializationVersion")
-                api("org.jetbrains.kotlinx:kotlinx-io-jvm:$ioVersion")
-            }
-        }
-        val jvmTest by getting {
-            dependencies {
-                implementation("org.jetbrains.kotlin:kotlin-test")
-                implementation("org.jetbrains.kotlin:kotlin-test-junit")
-            }
-        }
-        val jsMain by getting {
-            dependencies {
-                api("org.jetbrains.kotlinx:kotlinx-serialization-runtime-js:$serializationVersion")
-                api("org.jetbrains.kotlinx:kotlinx-io-js:$ioVersion")
-            }
-        }
-        val jsTest by getting {
-            dependencies {
-                implementation("org.jetbrains.kotlin:kotlin-test-js")
-            }
-        }
-//        iosMain {
-//        }
-//        iosTest {
-//        }
     }
 }
\ No newline at end of file
diff --git a/dataforge-io/src/commonMain/kotlin/hep/dataforge/io/FunctionServer.kt b/dataforge-io/src/commonMain/kotlin/hep/dataforge/io/FunctionServer.kt
new file mode 100644
index 00000000..2b254716
--- /dev/null
+++ b/dataforge-io/src/commonMain/kotlin/hep/dataforge/io/FunctionServer.kt
@@ -0,0 +1,38 @@
+package hep.dataforge.io
+
+import kotlin.reflect.KClass
+
+/**
+ * A descriptor for specific type of functions
+ */
+interface FunctionSpec<T : Any, R : Any> {
+    val inputType: KClass<T>
+    val outputType: KClass<R>
+}
+
+/**
+ * A server that could produce asynchronous function values
+ */
+interface FunctionServer {
+    /**
+     * Call a function with given name and descriptor
+     */
+    suspend fun <T : Any, R : Any, D : FunctionSpec<T, R>> call(name: String, descriptor: D, arg: T): R
+
+    /**
+     * Resolve a function descriptor for given types
+     */
+    fun <T : Any, R : Any> resolveType(inputType: KClass<out T>, outputType: KClass<out R>): FunctionSpec<T, R>
+
+    /**
+     * Get a generic suspended function with given name and descriptor
+     */
+    operator fun <T : Any, R : Any, D : FunctionSpec<T, R>> get(name: String, descriptor: D): (suspend (T) -> R) =
+        { call(name, descriptor, it) }
+}
+
+suspend inline fun <reified T : Any, reified R : Any> FunctionServer.call(name: String, arg: T): R =
+    call(name, resolveType(T::class, R::class), arg)
+
+inline operator fun <reified T : Any, reified R : Any> FunctionServer.get(name: String): (suspend (T) -> R) =
+    get(name, resolveType(T::class, R::class))
diff --git a/dataforge-io/src/commonMain/kotlin/hep/dataforge/io/MetaFormat.kt b/dataforge-io/src/commonMain/kotlin/hep/dataforge/io/MetaFormat.kt
index 52f01525..4e1f6dec 100644
--- a/dataforge-io/src/commonMain/kotlin/hep/dataforge/io/MetaFormat.kt
+++ b/dataforge-io/src/commonMain/kotlin/hep/dataforge/io/MetaFormat.kt
@@ -13,14 +13,21 @@ interface MetaFormat : IOFormat<Meta> {
     val key: Short
 }
 
-fun Meta.asString(format: MetaFormat = JsonMetaFormat): String {
-    return buildPacket {
-        format.run { writeObject(this@asString) }
-    }.readText()
+fun Meta.toString(format: MetaFormat = JsonMetaFormat): String = buildPacket {
+    format.run { writeObject(this@toString) }
+}.readText()
+
+fun Meta.toBytes(format: MetaFormat = JsonMetaFormat): ByteReadPacket = buildPacket {
+    format.run { writeObject(this@toBytes) }
 }
 
+
 fun MetaFormat.parse(str: String): Meta {
     return ByteReadPacket(str.toByteArray()).readObject()
 }
 
+fun MetaFormat.fromBytes(packet: ByteReadPacket): Meta {
+    return packet.readObject()
+}
+
 
diff --git a/dataforge-io/src/commonTest/kotlin/hep/dataforge/io/MetaFormatTest.kt b/dataforge-io/src/commonTest/kotlin/hep/dataforge/io/MetaFormatTest.kt
index e177e4d8..3788a0ef 100644
--- a/dataforge-io/src/commonTest/kotlin/hep/dataforge/io/MetaFormatTest.kt
+++ b/dataforge-io/src/commonTest/kotlin/hep/dataforge/io/MetaFormatTest.kt
@@ -1,6 +1,7 @@
 package hep.dataforge.io
 
 import hep.dataforge.meta.buildMeta
+import hep.dataforge.meta.get
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
@@ -12,10 +13,11 @@ class MetaFormatTest {
             "node" to {
                 "b" to "DDD"
                 "c" to 11.1
+                "array" to doubleArrayOf(1.0, 2.0, 3.0)
             }
         }
-        val string = meta.asString(BinaryMetaFormat)
-        val result = BinaryMetaFormat.parse(string)
+        val bytes = meta.toBytes(BinaryMetaFormat)
+        val result = BinaryMetaFormat.fromBytes(bytes)
         assertEquals(meta, result)
     }
 
@@ -26,11 +28,16 @@ class MetaFormatTest {
             "node" to {
                 "b" to "DDD"
                 "c" to 11.1
-                "array" to doubleArrayOf(1.0,2.0,3.0)
+                "array" to doubleArrayOf(1.0, 2.0, 3.0)
             }
         }
-        val string = meta.asString(JsonMetaFormat)
+        val string = meta.toString(JsonMetaFormat)
         val result = JsonMetaFormat.parse(string)
+
+        meta.items.keys.forEach {
+            if (meta[it] != result[it]) error("${meta[it]} != ${result[it]}")
+        }
+
         assertEquals(meta, result)
     }
 
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Config.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Config.kt
index 3ea2a39e..07ce8f96 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Config.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Config.kt
@@ -1,7 +1,9 @@
 package hep.dataforge.meta
 
+import hep.dataforge.names.Name
 import hep.dataforge.names.NameToken
 import hep.dataforge.names.asName
+import hep.dataforge.names.plus
 
 //TODO add validator to configuration
 
@@ -10,6 +12,43 @@ import hep.dataforge.names.asName
  */
 class Config : AbstractMutableMeta<Config>() {
 
+    private val listeners = HashSet<MetaListener>()
+
+    private fun itemChanged(name: Name, oldItem: MetaItem<*>?, newItem: MetaItem<*>?) {
+        listeners.forEach { it.action(name, oldItem, newItem) }
+    }
+
+    /**
+     * Add change listener to this meta. Owner is declared to be able to remove listeners later. Listener without owner could not be removed
+     */
+    fun onChange(owner: Any?, action: (Name, MetaItem<*>?, MetaItem<*>?) -> Unit) {
+        listeners.add(MetaListener(owner, action))
+    }
+
+    /**
+     * Remove all listeners belonging to given owner
+     */
+    fun removeListener(owner: Any?) {
+        listeners.removeAll { it.owner === owner }
+    }
+
+    override fun replaceItem(key: NameToken, oldItem: MetaItem<Config>?, newItem: MetaItem<Config>?) {
+        if (newItem == null) {
+            _items.remove(key)
+            if(oldItem!= null && oldItem is MetaItem.NodeItem<Config>) {
+                oldItem.node.removeListener(this)
+            }
+        } else {
+            _items[key] = newItem
+            if (newItem is MetaItem.NodeItem) {
+                newItem.node.onChange(this) { name, oldChild, newChild ->
+                    itemChanged(key + name, oldChild, newChild)
+                }
+            }
+        }
+        itemChanged(key.asName(), oldItem, newItem)
+    }
+
     /**
      * Attach configuration node instead of creating one
      */
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Laminate.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Laminate.kt
index 28240908..d8be0806 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Laminate.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Laminate.kt
@@ -79,4 +79,14 @@ class Laminate(layers: List<Meta>) : Meta {
     }
 }
 
+/**
+ * Create a new [Laminate] adding given layer to the top
+ */
+fun Laminate.withTop(meta: Meta): Laminate = Laminate(listOf(meta) + layers)
+
+/**
+ * Create a new [Laminate] adding given layer to the bottom
+ */
+fun Laminate.withBottom(meta: Meta): Laminate = Laminate(layers + meta)
+
 //TODO add custom rules for Laminate merge
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Meta.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Meta.kt
index 153beab1..9e71023c 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Meta.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Meta.kt
@@ -15,8 +15,16 @@ import hep.dataforge.values.boolean
  * * a [NodeItem] (node)
  */
 sealed class MetaItem<out M : Meta> {
-    data class ValueItem(val value: Value) : MetaItem<Nothing>()
-    data class NodeItem<M : Meta>(val node: M) : MetaItem<M>()
+    data class ValueItem(val value: Value) : MetaItem<Nothing>(){
+        override fun toString(): String = value.string
+    }
+    data class NodeItem<M : Meta>(val node: M) : MetaItem<M>(){
+        override fun toString(): String = node.toString()
+
+        override fun equals(other: Any?): Boolean {
+            return this.node == (other as? NodeItem<*>).node
+        }
+    }
 }
 
 /**
@@ -174,12 +182,14 @@ abstract class AbstractMetaNode<M : MetaNode<M>> : MetaNode<M> {
         if (this === other) return true
         if (other !is Meta) return false
 
-        return this.items == other.items
+        return this.items == other.items//this.items.keys == other.items.keys && items.keys.all { this[it] == other[it] }
     }
 
     override fun hashCode(): Int {
         return items.hashCode()
     }
+
+    override fun toString(): String = items.toString()
 }
 
 /**
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MetaTransformation.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MetaTransformation.kt
index 3d0e50e4..8deada19 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MetaTransformation.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MetaTransformation.kt
@@ -110,7 +110,7 @@ inline class MetaTransformation(val transformations: Collection<TransformationRu
     /**
      * Listens for changes in the source node and translates them into second node if transformation set contains a corresponding rule.
      */
-    fun <M : MutableMeta<M>> bind(source: MutableMeta<*>, target: M) {
+    fun <M : MutableMeta<M>> bind(source: Config, target: M) {
         source.onChange(target) { name, _, newItem ->
             transformations.forEach { t ->
                 if (t.matches(name, newItem)) {
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableMeta.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableMeta.kt
index 2be5c1a0..b9ab6f62 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableMeta.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/MutableMeta.kt
@@ -12,8 +12,8 @@ internal data class MetaListener(
 interface MutableMeta<M : MutableMeta<M>> : MetaNode<M> {
     override val items: Map<NameToken, MetaItem<M>>
     operator fun set(name: Name, item: MetaItem<*>?)
-    fun onChange(owner: Any? = null, action: (Name, MetaItem<*>?, MetaItem<*>?) -> Unit)
-    fun removeListener(owner: Any? = null)
+//    fun onChange(owner: Any? = null, action: (Name, MetaItem<*>?, MetaItem<*>?) -> Unit)
+//    fun removeListener(owner: Any? = null)
 }
 
 /**
@@ -22,46 +22,20 @@ interface MutableMeta<M : MutableMeta<M>> : MetaNode<M> {
  * Changes in Meta are not thread safe.
  */
 abstract class AbstractMutableMeta<M : MutableMeta<M>> : AbstractMetaNode<M>(), MutableMeta<M> {
-    private val listeners = HashSet<MetaListener>()
-
-    /**
-     * Add change listener to this meta. Owner is declared to be able to remove listeners later. Listener without owner could not be removed
-     */
-    override fun onChange(owner: Any?, action: (Name, MetaItem<*>?, MetaItem<*>?) -> Unit) {
-        listeners.add(MetaListener(owner, action))
-    }
-
-    /**
-     * Remove all listeners belonging to given owner
-     */
-    override fun removeListener(owner: Any?) {
-        listeners.removeAll { it.owner === owner }
-    }
-
-    private val _items: MutableMap<NameToken, MetaItem<M>> = HashMap()
+    protected val _items: MutableMap<NameToken, MetaItem<M>> = HashMap()
 
     override val items: Map<NameToken, MetaItem<M>>
         get() = _items
 
-    protected fun itemChanged(name: Name, oldItem: MetaItem<*>?, newItem: MetaItem<*>?) {
-        listeners.forEach { it.action(name, oldItem, newItem) }
-    }
+    //protected abstract fun itemChanged(name: Name, oldItem: MetaItem<*>?, newItem: MetaItem<*>?)
 
     protected open fun replaceItem(key: NameToken, oldItem: MetaItem<M>?, newItem: MetaItem<M>?) {
         if (newItem == null) {
             _items.remove(key)
-            if(oldItem!= null && oldItem is MetaItem.NodeItem<M>) {
-                oldItem.node.removeListener(this)
-            }
         } else {
             _items[key] = newItem
-            if (newItem is MetaItem.NodeItem) {
-                newItem.node.onChange(this) { name, oldChild, newChild ->
-                    itemChanged(key + name, oldChild, newChild)
-                }
-            }
         }
-        itemChanged(key.asName(), oldItem, newItem)
+        //itemChanged(key.asName(), oldItem, newItem)
     }
 
     @Suppress("UNCHECKED_CAST")
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Styled.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Styled.kt
index c34d933f..55d652aa 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Styled.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/meta/Styled.kt
@@ -42,12 +42,12 @@ class Styled(val base: Meta, val style: Config = Config().empty()) : AbstractMut
         }
     }
 
-    override fun onChange(owner: Any?, action: (Name, before: MetaItem<*>?, after: MetaItem<*>?) -> Unit) {
+    fun onChange(owner: Any?, action: (Name, before: MetaItem<*>?, after: MetaItem<*>?) -> Unit) {
         //TODO test correct behavior
         style.onChange(owner) { name, before, after -> action(name, before ?: base[name], after ?: base[name]) }
     }
 
-    override fun removeListener(owner: Any?) {
+    fun removeListener(owner: Any?) {
         style.removeListener(owner)
     }
 }
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt
index ac651c20..140178c2 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/Value.kt
@@ -43,6 +43,8 @@ interface Value {
     val list: List<Value>
         get() = listOf(this)
 
+    override fun equals(other: Any?): Boolean
+
     companion object {
         const val TYPE = "value"
 
@@ -82,6 +84,8 @@ object Null : Value {
     override val string: String get() = "@null"
 
     override fun toString(): String = value.toString()
+
+    override fun equals(other: Any?): Boolean = other === Null
 }
 
 /**
@@ -100,6 +104,9 @@ object True : Value {
     override val string: String get() = "true"
 
     override fun toString(): String = value.toString()
+
+    override fun equals(other: Any?): Boolean = other === True
+
 }
 
 /**
@@ -112,6 +119,8 @@ object False : Value {
     override val string: String get() = "false"
 
     override fun toString(): String = True.value.toString()
+
+    override fun equals(other: Any?): Boolean = other === False
 }
 
 val Value.boolean get() = this == True || this.list.firstOrNull() == True || (type == ValueType.STRING && string.toBoolean())
diff --git a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/exoticValues.kt b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/exoticValues.kt
index 9f13d73a..8ebc1c6b 100644
--- a/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/exoticValues.kt
+++ b/dataforge-meta/src/commonMain/kotlin/hep/dataforge/values/exoticValues.kt
@@ -12,9 +12,11 @@ class LazyParsedValue(override val string: String) : Value {
     override val number: Number get() = parsedValue.number
 
     override fun toString(): String = string
+
+    override fun equals(other: Any?): Boolean = other is Value && this.parsedValue == other
 }
 
-fun String.lazyParseValue(): LazyParsedValue  = LazyParsedValue(this)
+fun String.lazyParseValue(): LazyParsedValue = LazyParsedValue(this)
 
 /**
  * A performance optimized version of list value for doubles
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 73726216..011123b9 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,18 +1,18 @@
 pluginManagement {
     repositories {
+        mavenLocal()
         jcenter()
         gradlePluginPortal()
         maven("https://dl.bintray.com/kotlin/kotlin-eap")
+        maven("https://dl.bintray.com/kotlin/kotlinx")
         maven("https://dl.bintray.com/mipt-npm/scientifik")
+        maven("https://dl.bintray.com/mipt-npm/dev")
     }
     resolutionStrategy {
         eachPlugin {
             when (requested.id.id) {
                 "kotlinx-atomicfu" -> useModule("org.jetbrains.kotlinx:atomicfu-gradle-plugin:${requested.version}")
-                "kotlin-multiplatform" -> useModule("org.jetbrains.kotlin:kotlin-gradle-plugin:${requested.version}")
-                "kotlin2js" -> useModule("org.jetbrains.kotlin:kotlin-gradle-plugin:${requested.version}")
-                "org.jetbrains.kotlin.frontend" -> useModule("org.jetbrains.kotlin:kotlin-frontend-plugin:0.0.45")
-                "scientifik.mpp", "scientifik.publish" -> useModule("scientifik:gradle-tools:0.1.0")
+                "scientifik.mpp", "scientifik.publish" -> useModule("scientifik:gradle-tools:${requested.version}")
             }
         }
     }