diff --git a/numass-client/src/main/java/inr/numass/client/NumassClient.java b/numass-client/src/main/java/inr/numass/client/NumassClient.java
index e3a0fbbf..389d54e6 100644
--- a/numass-client/src/main/java/inr/numass/client/NumassClient.java
+++ b/numass-client/src/main/java/inr/numass/client/NumassClient.java
@@ -92,18 +92,18 @@ public class NumassClient implements AutoCloseable, Responder {
     }
 
     public Meta getCurrentRun() {
-        return respond(requestActionBase("numass.run", "get").build()).meta();
+        return respond(requestActionBase("numass.run", "get").build()).getMeta();
     }
 
     public Meta startRun(String name) {
         return respond(requestActionBase("numass.run", "start")
                 .putMetaValue("path", name)
-                .build()).meta();
+                .build()).getMeta();
     }
 
     public Meta resetRun() {
         return respond(requestActionBase("numass.run", "reset")
-                .build()).meta();
+                .build()).getMeta();
     }
 
     public Meta sendNumassData(String path, String fileName) {
@@ -137,7 +137,7 @@ public class NumassClient implements AutoCloseable, Responder {
                     .setData(buffer)
                     .build();
 
-            return respond(bin).meta();
+            return respond(bin).getMeta();
         } catch (IOException ex) {
             return StorageUtils.getErrorMeta(ex);
         }
@@ -157,7 +157,7 @@ public class NumassClient implements AutoCloseable, Responder {
             env.putMetaValue("name", Arrays.asList(stateNames));
         }
 
-        Meta response = respond(env.build()).meta();
+        Meta response = respond(env.build()).getMeta();
         if (response.getBoolean("success", true)) {
             Map<String, Value> res = new HashMap<>();
             response.getMetaList("state").stream().forEach((stateMeta) -> {
@@ -183,7 +183,7 @@ public class NumassClient implements AutoCloseable, Responder {
                 .setValue("value", value)
                 .build());
 
-        return respond(env.build()).meta();
+        return respond(env.build()).getMeta();
     }
 
     /**
@@ -200,7 +200,7 @@ public class NumassClient implements AutoCloseable, Responder {
                     .setValue("value", state.getValue())
                     .build());
         });
-        return respond(env.build()).meta();
+        return respond(env.build()).getMeta();
     }
 
     public Meta addNote(String text, Instant time) {
@@ -209,7 +209,7 @@ public class NumassClient implements AutoCloseable, Responder {
         if (time != null) {
             env.putMetaValue("note.time", time);
         }
-        return respond(env.build()).meta();
+        return respond(env.build()).getMeta();
     }
 
     public Meta getNotes(int limit) {
@@ -217,7 +217,7 @@ public class NumassClient implements AutoCloseable, Responder {
         if (limit > 0) {
             env.putMetaValue("limit", limit);
         }
-        return respond(env.build()).meta();
+        return respond(env.build()).getMeta();
     }
 
     /**
diff --git a/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Channel.kt b/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Channel.kt
index 62f3b02c..a225f7be 100644
--- a/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Channel.kt
+++ b/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Channel.kt
@@ -55,15 +55,15 @@ internal fun createChannel(meta: Meta): PKT8Channel {
 class PKT8Channel(private val _meta: Meta, val func: (Double) -> Double) : Named, Metoid {
 
     override fun getName(): String {
-        return meta().getString("name")
+        return getMeta().getString("name")
     }
 
-    override fun meta(): Meta {
+    override fun getMeta(): Meta {
         return _meta
     }
 
     fun description(): String {
-        return meta().getString("description", "")
+        return getMeta().getString("description", "")
     }
 
     /**
diff --git a/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Device.kt b/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Device.kt
index 33799997..9ba9213c 100644
--- a/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Device.kt
+++ b/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Device.kt
@@ -92,7 +92,7 @@ class PKT8Device(context: Context, meta: Meta) : PortSensor<PKT8Result>(context,
     val abuf: String
         get() = getState(ABUF).stringValue()
 
-    private val duration = Duration.parse(meta().getString("averagingDuration", "PT30S"))
+    private val duration = Duration.parse(getMeta().getString("averagingDuration", "PT30S"))
 
     private fun buildLoader(connection: StorageConnection): TableLoader {
         val storage = connection.storage
@@ -110,8 +110,8 @@ class PKT8Device(context: Context, meta: Meta) : PortSensor<PKT8Result>(context,
     override fun init() {
 
         //read channel configuration
-        if (meta().hasMeta("channel")) {
-            for (node in meta().getMetaList("channel")) {
+        if (getMeta().hasMeta("channel")) {
+            for (node in getMeta().getMetaList("channel")) {
                 val designation = node.getString("designation", "default")
                 this.channels.put(designation, createChannel(node))
             }
@@ -137,8 +137,8 @@ class PKT8Device(context: Context, meta: Meta) : PortSensor<PKT8Result>(context,
         }
 
 
-        setSPS(meta().getInt("sps", 0))
-        setBUF(meta().getInt("abuf", 100))
+        setSPS(getMeta().getInt("sps", 0))
+        setBUF(getMeta().getInt("abuf", 100))
 
         // setting up the collector
         storageHelper = StorageHelper(this) { connection: StorageConnection -> this.buildLoader(connection) }
@@ -156,7 +156,7 @@ class PKT8Device(context: Context, meta: Meta) : PortSensor<PKT8Result>(context,
         //setup connection
         val handler: Port = if ("virtual" == portName) {
             logger.info("Starting {} using virtual debug port", name)
-            PKT8VirtualPort("PKT8", meta().getMetaOrEmpty("debug"))
+            PKT8VirtualPort("PKT8", getMeta().getMetaOrEmpty("debug"))
         } else {
             super.buildPort(portName)
         }
diff --git a/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Display.kt b/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Display.kt
index ef072cf1..bcfcb2ac 100644
--- a/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Display.kt
+++ b/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8Display.kt
@@ -171,7 +171,7 @@ class PKT8Display : DeviceDisplay<PKT8Device>(), MeasurementListener {
         }
 
         init {
-            if (device.meta().hasMeta("plotConfig")) {
+            if (device.getMeta().hasMeta("plotConfig")) {
                 with(plotFrame.plots) {
                     //configure(device.meta().getMeta("plotConfig"))
                     TimePlot.setMaxItems(this, 1000)
@@ -199,7 +199,7 @@ class PKT8Display : DeviceDisplay<PKT8Device>(), MeasurementListener {
             } else {
                 device.channels.values.find { it.name == channelName }?.let {
                     TimePlot(it.name).apply {
-                        configure(it.meta())
+                        configure(it.getMeta())
                         plotFrame.add(this)
                     }
                 }
diff --git a/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8VirtualPort.kt b/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8VirtualPort.kt
index 769d4493..cc706557 100644
--- a/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8VirtualPort.kt
+++ b/numass-control/cryotemp/src/main/kotlin/inr/numass/control/cryotemp/PKT8VirtualPort.kt
@@ -31,7 +31,7 @@ class PKT8VirtualPort(portName: String, meta: Meta) : VirtualPort(meta), Metoid
             "s" -> {
                 val letters = arrayOf("a", "b", "c", "d", "e", "f", "g", "h")
                 for (letter in letters) {
-                    val channelMeta = MetaUtils.findNodeByValue(meta(), "channel", "letter", Value.of(letter)).orElse(Meta.empty())
+                    val channelMeta = MetaUtils.findNodeByValue(getMeta(), "channel", "letter", Value.of(letter)).orElse(Meta.empty())
 
                     val average: Double
                     val sigma: Double
diff --git a/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/LambdaHub.kt b/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/LambdaHub.kt
index 88ee6e38..6649b945 100644
--- a/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/LambdaHub.kt
+++ b/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/LambdaHub.kt
@@ -8,7 +8,6 @@ import hep.dataforge.control.devices.StateDef
 import hep.dataforge.control.ports.Port
 import hep.dataforge.control.ports.PortFactory
 import hep.dataforge.description.ValueDef
-import hep.dataforge.kodex.useEachMeta
 import hep.dataforge.meta.Meta
 import hep.dataforge.names.Name
 import hep.dataforge.values.ValueType
diff --git a/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/VirtualLambdaPort.kt b/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/VirtualLambdaPort.kt
index e5ac2974..47b09a34 100644
--- a/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/VirtualLambdaPort.kt
+++ b/numass-control/magnet/src/main/kotlin/inr/numass/control/magnet/VirtualLambdaPort.kt
@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright 2015 Alexander Nozik.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -17,7 +17,6 @@ package inr.numass.control.magnet
 
 import hep.dataforge.control.ports.VirtualPort
 import hep.dataforge.exceptions.PortException
-import hep.dataforge.kodex.useEachMeta
 import hep.dataforge.meta.Meta
 import org.slf4j.LoggerFactory
 import java.time.Duration
diff --git a/numass-control/msp/src/main/kotlin/inr/numass/control/msp/MspDevice.kt b/numass-control/msp/src/main/kotlin/inr/numass/control/msp/MspDevice.kt
index c5af5a72..4b48aa99 100644
--- a/numass-control/msp/src/main/kotlin/inr/numass/control/msp/MspDevice.kt
+++ b/numass-control/msp/src/main/kotlin/inr/numass/control/msp/MspDevice.kt
@@ -74,7 +74,7 @@ class MspDevice(context: Context, meta: Meta) : PortSensor<Values>(context, meta
     val isFilamentOn: Boolean
         get() = getState("filamentOn").booleanValue()
 
-    private val averagingDuration: Duration = Duration.parse(meta().getString("averagingDuration", "PT30S"))
+    private val averagingDuration: Duration = Duration.parse(getMeta().getString("averagingDuration", "PT30S"))
 
     @Throws(ControlException::class)
     override fun init() {
@@ -140,7 +140,7 @@ class MspDevice(context: Context, meta: Meta) : PortSensor<Values>(context, meta
 
     @Throws(MeasurementException::class)
     override fun createMeasurement(): PeakJumpMeasurement {
-        val measurementMeta = meta().getMeta("peakJump")
+        val measurementMeta = getMeta().getMeta("peakJump")
         val s = measurementMeta.getString("type", "peakJump")
         if (s == "peakJump") {
             val measurement = PeakJumpMeasurement(measurementMeta)
diff --git a/numass-control/msp/src/main/kotlin/inr/numass/control/msp/MspDisplay.kt b/numass-control/msp/src/main/kotlin/inr/numass/control/msp/MspDisplay.kt
index 2c25ab4d..959b4b87 100644
--- a/numass-control/msp/src/main/kotlin/inr/numass/control/msp/MspDisplay.kt
+++ b/numass-control/msp/src/main/kotlin/inr/numass/control/msp/MspDisplay.kt
@@ -71,7 +71,7 @@ class MspDisplay() : DeviceDisplay<MspDevice>(), DeviceListener, NamedValueListe
 
 
     inner class MspView : View("Numass mass-spectrometer measurement") {
-        private val plotFrameMeta: Meta = device.meta().getMeta("plotConfig", device.meta)
+        private val plotFrameMeta: Meta = device.getMeta().getMeta("plotConfig", device.meta)
 
         private val plotFrame: PlotFrame by lazy {
             val basePlotConfig = MetaBuilder("plotFrame")
diff --git a/numass-control/src/main/kotlin/inr/numass/control/ControlExtensions.kt b/numass-control/src/main/kotlin/inr/numass/control/ControlExtensions.kt
new file mode 100644
index 00000000..c4fe978e
--- /dev/null
+++ b/numass-control/src/main/kotlin/inr/numass/control/ControlExtensions.kt
@@ -0,0 +1,62 @@
+package inr.numass.control
+
+import hep.dataforge.control.devices.Stateful
+import hep.dataforge.values.Value
+import java.time.Instant
+import kotlin.reflect.KProperty
+
+class StateDelegate(private val stateName: String?) {
+    operator fun getValue(thisRef: Stateful, property: KProperty<*>): Value? =
+            thisRef.getState(stateName ?: property.name)
+
+    operator fun setValue(thisRef: Stateful, property: KProperty<*>, value: Value?) {
+        thisRef.setState(stateName ?: property.name, value);
+    }
+}
+
+class StringStateDelegate(private val stateName: String?) {
+    operator fun getValue(thisRef: Stateful, property: KProperty<*>): String? =
+            thisRef.getState(stateName ?: property.name).stringValue()
+
+    operator fun setValue(thisRef: Stateful, property: KProperty<*>, value: String?) {
+        thisRef.setState(stateName ?: property.name, value);
+    }
+}
+
+class BooleanStateDelegate(private val stateName: String?) {
+    operator fun getValue(thisRef: Stateful, property: KProperty<*>): Boolean? =
+            thisRef.getState(stateName ?: property.name).booleanValue()
+
+    operator fun setValue(thisRef: Stateful, property: KProperty<*>, value: Boolean?) {
+        thisRef.setState(stateName ?: property.name, value);
+    }
+}
+
+class TimeStateDelegate(private val stateName: String?) {
+    operator fun getValue(thisRef: Stateful, property: KProperty<*>): Instant? =
+            thisRef.getState(stateName ?: property.name).timeValue()
+
+    operator fun setValue(thisRef: Stateful, property: KProperty<*>, value: Instant?) {
+        thisRef.setState(stateName ?: property.name, value);
+    }
+}
+
+class NumberStateDelegate(private val stateName: String?) {
+    operator fun getValue(thisRef: Stateful, property: KProperty<*>): Number? =
+            thisRef.getState(stateName ?: property.name).numberValue()
+
+    operator fun setValue(thisRef: Stateful, property: KProperty<*>, value: Number?) {
+        thisRef.setState(stateName ?: property.name, value);
+    }
+}
+
+
+/**
+ * Delegate states to read/write property
+ */
+fun Stateful.state(stateName: String? = null) = StateDelegate(stateName)
+
+fun Stateful.stringState(stateName: String? = null) = StringStateDelegate(stateName)
+fun Stateful.booleanState(stateName: String? = null) = BooleanStateDelegate(stateName)
+fun Stateful.timeState(stateName: String? = null) = TimeStateDelegate(stateName)
+fun Stateful.numberState(stateName: String? = null) = NumberStateDelegate(stateName)
diff --git a/numass-control/src/main/kotlin/inr/numass/control/NumassControlUtils.kt b/numass-control/src/main/kotlin/inr/numass/control/NumassControlUtils.kt
index 0bbafffa..8e7d6809 100644
--- a/numass-control/src/main/kotlin/inr/numass/control/NumassControlUtils.kt
+++ b/numass-control/src/main/kotlin/inr/numass/control/NumassControlUtils.kt
@@ -42,7 +42,7 @@ fun connectStorage(device: Device, config: Meta) {
     if (config.hasMeta("storage") && device.acceptsRole(Roles.STORAGE_ROLE)) {
         val numassRun = ClientUtils.getRunName(config)
         config.getMetaList("storage").forEach { node ->
-            device.context.logger.info("Creating storage for device with meta: {}", node)
+            device.context.logger.info("Creating storage for device with getMeta: {}", node)
             //building storage in a separate thread
             Thread {
                 var storage = StorageFactory.buildStorage(device.context, node)
diff --git a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/CM32Device.kt b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/CM32Device.kt
index 83d86e6e..5ba26616 100644
--- a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/CM32Device.kt
+++ b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/CM32Device.kt
@@ -38,7 +38,9 @@ class CM32Device(context: Context, meta: Meta) : PortSensor<Double>(context, met
 
     override fun createMeasurement(): Measurement<Double> = CMVacMeasurement()
 
-    override fun getType(): String = meta().getString("type", "numass.vac.CM32")
+    override fun getType(): String {
+        return getMeta().getString("type", "Leibold CM32")
+    }
 
     private inner class CMVacMeasurement : SimpleMeasurement<Double>() {
 
diff --git a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSBaratronDevice.kt b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSBaratronDevice.kt
index b589d15a..c20ec6a2 100644
--- a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSBaratronDevice.kt
+++ b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSBaratronDevice.kt
@@ -23,12 +23,14 @@ import inr.numass.control.DeviceView
 @DeviceView(VacDisplay::class)
 class MKSBaratronDevice(context: Context, meta: Meta) : PortSensor<Double>(context, meta) {
 
-    private val channel: Int = meta().getInt("channel", 2)
+    private val channel: Int = getMeta().getInt("channel", 2)
 
 
     override fun createMeasurement(): Measurement<Double> = BaratronMeasurement()
 
-    override fun getType(): String = meta().getString("type", "numass.vac.baratron")
+    override fun getType(): String {
+        return getMeta().getString("type", "MKS baratron")
+    }
 
     @Throws(ControlException::class)
     override fun buildPort(portName: String): Port {
diff --git a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSVacDevice.kt b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSVacDevice.kt
index 9aa57e0f..062ed4a6 100644
--- a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSVacDevice.kt
+++ b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MKSVacDevice.kt
@@ -22,7 +22,6 @@ import inr.numass.control.DeviceView
 import javafx.beans.property.BooleanProperty
 import javafx.beans.property.SimpleBooleanProperty
 import javafx.beans.property.SimpleIntegerProperty
-import javafx.beans.property.SimpleStringProperty
 import javafx.beans.property.adapter.JavaBeanBooleanPropertyBuilder
 import tornadofx.*
 import java.util.regex.Pattern
@@ -39,8 +38,8 @@ import java.util.regex.Pattern
 @DeviceView(VacDisplay::class)
 class MKSVacDevice(context: Context, meta: Meta) : PortSensor<Double>(context, meta) {
 
-    val deviceAddressProperty = SimpleStringProperty()
-    var deviceAddress by deviceAddressProperty
+    private val deviceAddress: String
+        get() = getMeta().getString("address", "253")
 
 
     val isPowerOnProperty = SimpleBooleanProperty()
@@ -105,7 +104,9 @@ class MKSVacDevice(context: Context, meta: Meta) : PortSensor<Double>(context, m
 
     }
 
-    override fun getType(): String = meta().getString("type", "MKS vacuumeter")
+    override fun getType(): String {
+        return getMeta().getString("type", "MKS vacuumeter")
+    }
 
     private inner class MKSVacMeasurement : SimpleMeasurement<Double>() {
 
diff --git a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MeradatVacDevice.kt b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MeradatVacDevice.kt
index 396e6010..27dbc50e 100644
--- a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MeradatVacDevice.kt
+++ b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/MeradatVacDevice.kt
@@ -35,17 +35,19 @@ class MeradatVacDevice(context: Context, meta: Meta) : PortSensor<Double>(contex
 
     override fun createMeasurement(): Measurement<Double> = MeradatMeasurement()
 
-    override fun getType(): String = meta().getString("type", "Vit vacuumeter")
+    override fun getType(): String {
+        return getMeta().getString("type", "Vit vacuumeter")
+    }
 
 
     private inner class MeradatMeasurement : SimpleMeasurement<Double>() {
 
-
-        private val response: Pattern
-        private val base: String = String.format(":%02d", meta().getInt("address", 1))
         private val query: String // ":010300000002FA\r\n";
+        private val response: Pattern
+        private val base: String
 
         init {
+            base = String.format(":%02d", getMeta().getInt("address", 1))
             val dataStr = base.substring(1) + REQUEST
             query = base + REQUEST + calculateLRC(dataStr) + "\r\n"
             response = Pattern.compile(base + "0304(\\w{4})(\\w{4})..\r\n")
diff --git a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDevice.kt b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDevice.kt
index 39e9d891..75066eee 100644
--- a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDevice.kt
+++ b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDevice.kt
@@ -52,7 +52,7 @@ class VacCollectorDevice(context: Context, meta: Meta, val sensors: Collection<S
     private val helper = StorageHelper(this, this::buildLoader)
 
     private val averagingDuration: Duration
-        get() = Duration.parse(meta().getString("averagingDuration", "PT30S"))
+        get() = Duration.parse(getMeta().getString("averagingDuration", "PT30S"))
 
 
     override fun optDevice(name: Name): Optional<Device> =
@@ -114,7 +114,7 @@ class VacCollectorDevice(context: Context, meta: Meta, val sensors: Collection<S
 
         override fun start() {
             executor = Executors.newSingleThreadScheduledExecutor { r: Runnable -> Thread(r, "VacuumMeasurement thread") }
-            val delay = meta().getInt("delay", 5)!! * 1000
+            val delay = getMeta().getInt("delay", 5)!! * 1000
             currentTask = executor!!.scheduleWithFixedDelay({
                 sensors.forEach { sensor ->
                     try {
diff --git a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDisplay.kt b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDisplay.kt
index bf390471..49212151 100644
--- a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDisplay.kt
+++ b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDisplay.kt
@@ -68,7 +68,7 @@ class VacCollectorDisplay : DeviceDisplay<VacCollectorDevice>() {
         private val plottables = TimePlottableGroup().apply {
             viewList.forEach {
                 val plot = TimePlot(it.getTitle(), it.device.name)
-                plot.configure(it.device.meta())
+                plot.configure(it.device.getMeta())
                 add(plot)
             }
             setValue("thickness", 3)
diff --git a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacDisplay.kt b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacDisplay.kt
index d8e2e856..2c63deb4 100644
--- a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacDisplay.kt
+++ b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacDisplay.kt
@@ -78,7 +78,7 @@ open class VacDisplay : DeviceDisplay<Sensor<Double>>(), MeasurementListener {
     }
 
     fun getTitle(): String{
-        return device.meta().getString("title", device.name);
+        return device.getMeta().getString("title", device.name);
     }
 
     inner class VacView : View("Numass vacuumeter ${getTitle()}") {
@@ -123,7 +123,7 @@ open class VacDisplay : DeviceDisplay<Sensor<Double>>(), MeasurementListener {
                                 prefHeight = 60.0
                                 alignment = Pos.CENTER_RIGHT
                                 textProperty().bind(valueProperty)
-                                device.meta().optValue("color").ifPresent { colorValue -> textFill = Color.valueOf(colorValue.stringValue()) }
+                                device.getMeta().optValue("color").ifPresent { colorValue -> textFill = Color.valueOf(colorValue.stringValue()) }
                                 style {
                                     fontSize = 24.pt
                                     fontWeight = FontWeight.BOLD
@@ -136,7 +136,7 @@ open class VacDisplay : DeviceDisplay<Sensor<Double>>(), MeasurementListener {
                                 prefHeight = 60.0
                                 prefWidth = 75.0
                                 alignment = Pos.CENTER_LEFT
-                                text = device.meta().getString("units", "mbar")
+                                text = device.getMeta().getString("units", "mbar")
                                 style {
                                     fontSize = 24.pt
                                 }
diff --git a/numass-core/src/main/java/inr/numass/data/NumassDataUtils.java b/numass-core/src/main/java/inr/numass/data/NumassDataUtils.java
index 56f3fe38..f0f50de8 100644
--- a/numass-core/src/main/java/inr/numass/data/NumassDataUtils.java
+++ b/numass-core/src/main/java/inr/numass/data/NumassDataUtils.java
@@ -35,9 +35,9 @@ public class NumassDataUtils {
             }
 
             @Override
-            public Meta meta() {
+            public Meta getMeta() {
                 MetaBuilder metaBuilder = new MetaBuilder();
-                sets.forEach(set -> metaBuilder.putNode(set.getName(), set.meta()));
+                sets.forEach(set -> metaBuilder.putNode(set.getName(), set.getMeta()));
                 return metaBuilder;
             }
 
diff --git a/numass-core/src/main/java/inr/numass/data/api/NumassPoint.java b/numass-core/src/main/java/inr/numass/data/api/NumassPoint.java
index 3134839a..1c71d171 100644
--- a/numass-core/src/main/java/inr/numass/data/api/NumassPoint.java
+++ b/numass-core/src/main/java/inr/numass/data/api/NumassPoint.java
@@ -24,7 +24,7 @@ public interface NumassPoint extends Metoid, NumassBlock {
      * @return
      */
     default double getVoltage() {
-        return meta().getDouble(HV_KEY, 0);
+        return getMeta().getDouble(HV_KEY, 0);
     }
 
     /**
@@ -41,7 +41,7 @@ public interface NumassPoint extends Metoid, NumassBlock {
      */
     @Override
     default Instant getStartTime() {
-        return meta().optValue(START_TIME_KEY).map(Value::timeValue).orElseGet(() -> getFirstBlock().getStartTime());
+        return getMeta().optValue(START_TIME_KEY).map(Value::timeValue).orElseGet(() -> getFirstBlock().getStartTime());
     }
 
     /**
@@ -52,7 +52,7 @@ public interface NumassPoint extends Metoid, NumassBlock {
     @Override
     default Duration getLength() {
         return Duration.ofNanos(
-                meta().optValue(LENGTH_KEY).map(Value::longValue)
+                getMeta().optValue(LENGTH_KEY).map(Value::longValue)
                         .orElseGet(() -> getBlocks().mapToLong(it -> it.getLength().toNanos()).sum())
         );
     }
diff --git a/numass-core/src/main/java/inr/numass/data/api/NumassSet.java b/numass-core/src/main/java/inr/numass/data/api/NumassSet.java
index 17bb638e..2d415f3e 100644
--- a/numass-core/src/main/java/inr/numass/data/api/NumassSet.java
+++ b/numass-core/src/main/java/inr/numass/data/api/NumassSet.java
@@ -33,7 +33,7 @@ public interface NumassSet extends Named, Metoid, Iterable<NumassPoint>, Provide
     Stream<NumassPoint> getPoints();
 
     default String getDescription() {
-        return meta().getString(DESCRIPTION_KEY, "");
+        return getMeta().getString(DESCRIPTION_KEY, "");
     }
 
     @NotNull
@@ -57,7 +57,7 @@ public interface NumassSet extends Named, Metoid, Iterable<NumassPoint>, Provide
      * @return
      */
     default Instant getStartTime() {
-        return meta().optValue(NumassPoint.START_TIME_KEY).map(Value::timeValue).orElseGet(() -> getFirstPoint().getStartTime());
+        return getMeta().optValue(NumassPoint.START_TIME_KEY).map(Value::timeValue).orElseGet(() -> getFirstPoint().getStartTime());
     }
 
     /**
diff --git a/numass-core/src/main/java/inr/numass/data/legacy/NumassDatFile.java b/numass-core/src/main/java/inr/numass/data/legacy/NumassDatFile.java
index 7c3026fb..ca933a02 100644
--- a/numass-core/src/main/java/inr/numass/data/legacy/NumassDatFile.java
+++ b/numass-core/src/main/java/inr/numass/data/legacy/NumassDatFile.java
@@ -47,7 +47,7 @@ public class NumassDatFile implements NumassSet {
     }
 
     @Override
-    public Meta meta() {
+    public Meta getMeta() {
         return meta;
     }
 
@@ -57,11 +57,11 @@ public class NumassDatFile implements NumassSet {
     }
 
     private double getHVdev() {
-        return meta().getDouble("dat.hvDev", 2.468555393226049);
+        return getMeta().getDouble("dat.hvDev", 2.468555393226049);
     }
 
     private boolean hasUset() {
-        return meta().getBoolean("dat.uSet", true);
+        return getMeta().getBoolean("dat.uSet", true);
     }
 
     private static String readHead(Path path) throws IOException {
diff --git a/numass-core/src/main/java/inr/numass/data/storage/ClassicNumassPoint.java b/numass-core/src/main/java/inr/numass/data/storage/ClassicNumassPoint.java
index 5f53f372..13486252 100644
--- a/numass-core/src/main/java/inr/numass/data/storage/ClassicNumassPoint.java
+++ b/numass-core/src/main/java/inr/numass/data/storage/ClassicNumassPoint.java
@@ -33,18 +33,18 @@ public class ClassicNumassPoint implements NumassPoint {
     public Stream<NumassBlock> getBlocks() {
 //        double u = envelope.meta().getDouble("external_meta.HV1_value", 0);
         long length;
-        if (envelope.meta().hasValue("external_meta.acquisition_time")) {
-            length = envelope.meta().getValue("external_meta.acquisition_time").longValue();
+        if (envelope.getMeta().hasValue("external_meta.acquisition_time")) {
+            length = envelope.getMeta().getValue("external_meta.acquisition_time").longValue();
         } else {
-            length = envelope.meta().getValue("acquisition_time").longValue();
+            length = envelope.getMeta().getValue("acquisition_time").longValue();
         }
         return Stream.of(new ClassicBlock(getStartTime(), Duration.ofSeconds(length)));
     }
 
     @Override
     public Instant getStartTime() {
-        if (meta().hasValue("start_time")) {
-            return meta().getValue("start_time").timeValue();
+        if (getMeta().hasValue("start_time")) {
+            return getMeta().getValue("start_time").timeValue();
         } else {
             return Instant.EPOCH;
         }
@@ -52,12 +52,12 @@ public class ClassicNumassPoint implements NumassPoint {
 
     @Override
     public double getVoltage() {
-        return meta().getDouble("external_meta.HV1_value", 0);
+        return getMeta().getDouble("external_meta.HV1_value", 0);
     }
 
     @Override
-    public Meta meta() {
-        return envelope.meta();
+    public Meta getMeta() {
+        return envelope.getMeta();
     }
 
     //TODO split blocks using meta
@@ -90,7 +90,7 @@ public class ClassicNumassPoint implements NumassPoint {
         @NotNull
         @Override
         public Iterator<NumassEvent> iterator() {
-            double timeCoef = envelope.meta().getDouble("time_coeff", 50);
+            double timeCoef = envelope.getMeta().getDouble("time_coeff", 50);
             try {
                 ByteBuffer buffer = ByteBuffer.allocate(7000);
                 buffer.order(ByteOrder.LITTLE_ENDIAN);
diff --git a/numass-core/src/main/java/inr/numass/data/storage/NumassDataLoader.java b/numass-core/src/main/java/inr/numass/data/storage/NumassDataLoader.java
index 04f3142a..a8fd0a1c 100644
--- a/numass-core/src/main/java/inr/numass/data/storage/NumassDataLoader.java
+++ b/numass-core/src/main/java/inr/numass/data/storage/NumassDataLoader.java
@@ -148,11 +148,11 @@ public class NumassDataLoader extends AbstractLoader implements ObjectLoader<Env
     }
 
     @Override
-    public Meta meta() {
+    public Meta getMeta() {
         return getItems()
                 .get(META_FRAGMENT_NAME)
                 .get()
-                .meta();
+                .getMeta();
 
     }
 
@@ -178,7 +178,7 @@ public class NumassDataLoader extends AbstractLoader implements ObjectLoader<Env
         return getItems().entrySet().stream()
                 .filter(entry -> entry.getKey().startsWith(POINT_FRAGMENT_NAME) && entry.getValue() != null)
                 .map(entry -> entry.getValue().get())
-                .sorted(Comparator.comparing(t -> t.meta().getInt("external_meta.point_index", -1)));
+                .sorted(Comparator.comparing(t -> t.getMeta().getInt("external_meta.point_index", -1)));
 
     }
 
@@ -188,7 +188,7 @@ public class NumassDataLoader extends AbstractLoader implements ObjectLoader<Env
     }
 
     public boolean isReversed() {
-        return meta().getBoolean("iteration_info.reverse", false);
+        return this.getMeta().getBoolean("iteration_info.reverse", false);
     }
 
     @Override
@@ -219,7 +219,7 @@ public class NumassDataLoader extends AbstractLoader implements ObjectLoader<Env
 
     @Override
     public String getDescription() {
-        return meta().getString("description", "").replace("\\n", "\n");
+        return this.getMeta().getString("description", "").replace("\\n", "\n");
     }
 
     @Override
diff --git a/numass-core/src/main/java/inr/numass/data/storage/NumassStorage.java b/numass-core/src/main/java/inr/numass/data/storage/NumassStorage.java
index 3679651e..fab5924c 100644
--- a/numass-core/src/main/java/inr/numass/data/storage/NumassStorage.java
+++ b/numass-core/src/main/java/inr/numass/data/storage/NumassStorage.java
@@ -75,7 +75,7 @@ public class NumassStorage extends FileStorage {
                                     NumassDataLoader.fromDir(this, file, null));
                         } else {
                             this.shelves.put(entryName(file),
-                                    new NumassStorage(this, entryName(file), meta()));
+                                    new NumassStorage(this, entryName(file), getMeta()));
                         }
                     } else if (file.getFileName().endsWith(NUMASS_ZIP_EXTENSION)) {
                         this.loaders.put(entryName(file), NumassDataLoader.fromFile(this, file));
@@ -163,7 +163,7 @@ public class NumassStorage extends FileStorage {
     }
 
     public String getDescription() {
-        return meta().getString("description", "");
+        return getMeta().getString("description", "");
     }
 
     public static class NumassDataPointEvent extends Event {
@@ -187,11 +187,11 @@ public class NumassStorage extends FileStorage {
         }
 
         public int getFileSize() {
-            return meta().getInt(FILE_SIZE_KEY, 0);
+            return getMeta().getInt(FILE_SIZE_KEY, 0);
         }
 
         public String getFileName() {
-            return meta().getString(FILE_NAME_KEY);
+            return getMeta().getString(FILE_NAME_KEY);
         }
 
         @Override
diff --git a/numass-core/src/main/java/inr/numass/data/storage/ProtoNumassPoint.java b/numass-core/src/main/java/inr/numass/data/storage/ProtoNumassPoint.java
index 60b7a47e..ce325a7a 100644
--- a/numass-core/src/main/java/inr/numass/data/storage/ProtoNumassPoint.java
+++ b/numass-core/src/main/java/inr/numass/data/storage/ProtoNumassPoint.java
@@ -54,8 +54,8 @@ public class ProtoNumassPoint implements NumassPoint {
     }
 
     @Override
-    public Meta meta() {
-        return envelope.meta();
+    public Meta getMeta() {
+        return envelope.getMeta();
     }
 
     public static Instant ofEpochNanos(long nanos) {
@@ -81,7 +81,7 @@ public class ProtoNumassPoint implements NumassPoint {
 
         @Override
         public Duration getLength() {
-            return Duration.ofNanos((long) (meta().getInt("b_size") / meta().getInt("sample_freq") * 1e9));
+            return Duration.ofNanos((long) (getMeta().getInt("b_size") / getMeta().getInt("sample_freq") * 1e9));
         }
 
         @Override
@@ -99,7 +99,7 @@ public class ProtoNumassPoint implements NumassPoint {
 
         @Override
         public Stream<NumassFrame> getFrames() {
-            Duration tickSize = Duration.ofNanos((long) (1e9 / meta().getInt("params.sample_freq")));
+            Duration tickSize = Duration.ofNanos((long) (1e9 / getMeta().getInt("params.sample_freq")));
             return block.getFramesList().stream().map(frame -> {
                 Instant time = getStartTime().plusNanos(frame.getTime());
                 ByteBuffer data = frame.getData().asReadOnlyByteBuffer();
diff --git a/numass-main/src/main/java/inr/numass/NumassIO.java b/numass-main/src/main/java/inr/numass/NumassIO.java
index 04a104f4..d58fdbbe 100644
--- a/numass-main/src/main/java/inr/numass/NumassIO.java
+++ b/numass-main/src/main/java/inr/numass/NumassIO.java
@@ -61,7 +61,7 @@ public class NumassIO extends BasicIOManager {
         ple.setContext(lc);
         ple.start();
         FileAppender<ILoggingEvent> appender = new FileAppender<>();
-        appender.setFile(new File(getWorkDirectory().toFile(), meta().getString("logFileName", "numass.log")).toString());
+        appender.setFile(new File(getWorkDirectory().toFile(), getMeta().getString("logFileName", "numass.log")).toString());
         appender.setEncoder(ple);
         return appender;
     }
diff --git a/numass-main/src/main/kotlin/inr/numass/NumassUtils.kt b/numass-main/src/main/kotlin/inr/numass/NumassUtils.kt
index e847d9ed..9eac8e6e 100644
--- a/numass-main/src/main/kotlin/inr/numass/NumassUtils.kt
+++ b/numass-main/src/main/kotlin/inr/numass/NumassUtils.kt
@@ -138,10 +138,10 @@ object NumassUtils {
         set.points.forEach { point ->
             val pointMeta = MetaBuilder("point")
                     .putValue("voltage", point.voltage)
-                    .putValue("index", point.meta().getInt("external_meta.point_index", -1))
-                    .putValue("run", point.meta().getString("external_meta.session", ""))
-                    .putValue("group", point.meta().getString("external_meta.group", ""))
-            val pointName = "point_" + point.meta().getInt("external_meta.point_index", point.hashCode())!!
+                    .putValue("index", point.getMeta().getInt("external_meta.point_index", -1))
+                    .putValue("run", point.getMeta().getString("external_meta.session", ""))
+                    .putValue("group", point.getMeta().getString("external_meta.group", ""))
+            val pointName = "point_" + point.getMeta().getInt("external_meta.point_index", point.hashCode())!!
             builder.putData(pointName, point, pointMeta)
         }
         set.hvData.ifPresent { hv -> builder.putData("hv", hv, Meta.empty()) }
diff --git a/numass-main/src/main/kotlin/inr/numass/actions/MergeDataAction.kt b/numass-main/src/main/kotlin/inr/numass/actions/MergeDataAction.kt
index 2f089e2b..20c3102e 100644
--- a/numass-main/src/main/kotlin/inr/numass/actions/MergeDataAction.kt
+++ b/numass-main/src/main/kotlin/inr/numass/actions/MergeDataAction.kt
@@ -41,7 +41,7 @@ class MergeDataAction : ManyToOneAction<Table, Table>() {
     val parnames = arrayOf(NumassPoint.HV_KEY, NumassPoint.LENGTH_KEY, NumassAnalyzer.COUNT_KEY, NumassAnalyzer.COUNT_RATE_KEY, NumassAnalyzer.COUNT_RATE_ERROR_KEY)
 
     override fun buildGroups(context: Context, input: DataNode<Table>, actionMeta: Meta): List<DataNode<Table>> {
-        val meta = inputMeta(context, input.meta(), actionMeta)
+        val meta = inputMeta(context, input.getMeta(), actionMeta)
         val groups: List<DataNode<Table>>
         if (meta.hasValue("grouping.byValue")) {
             groups = super.buildGroups(context, input, actionMeta)
diff --git a/numass-main/src/main/kotlin/inr/numass/actions/SummaryAction.kt b/numass-main/src/main/kotlin/inr/numass/actions/SummaryAction.kt
index 45995b1c..9eff67f6 100644
--- a/numass-main/src/main/kotlin/inr/numass/actions/SummaryAction.kt
+++ b/numass-main/src/main/kotlin/inr/numass/actions/SummaryAction.kt
@@ -40,7 +40,7 @@ import java.util.*
 class SummaryAction : ManyToOneAction<FitState, Table>() {
 
     protected override fun buildGroups(context: Context, input: DataNode<FitState>, actionMeta: Meta): List<DataNode<FitState>> {
-        val meta = inputMeta(context, input.meta(), actionMeta)
+        val meta = inputMeta(context, input.getMeta(), actionMeta)
         val groups: List<DataNode<FitState>>
         if (meta.hasValue("grouping.byValue")) {
             groups = super.buildGroups(context, input, actionMeta)
diff --git a/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanSummaryTask.kt b/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanSummaryTask.kt
index b0b1a45d..9fe903be 100644
--- a/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanSummaryTask.kt
+++ b/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanSummaryTask.kt
@@ -30,7 +30,7 @@ class NumassFitScanSummaryTask : AbstractTask<Table>() {
         val builder = DataSet.builder(Table::class.java)
         val action = FitSummaryAction()
         val input = data.checked(FitResult::class.java)
-        input.nodeStream().filter { it -> it.dataSize(false) > 0 }.forEach { node -> builder.putData(node.name, action.run(model.context, node, model.meta()).data) }
+        input.nodeStream().filter { it -> it.dataSize(false) > 0 }.forEach { node -> builder.putData(node.name, action.run(model.context, node, model.getMeta()).data) }
         return builder.build()
     }
 
diff --git a/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanTask.kt b/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanTask.kt
index 9fa11f43..14868de5 100644
--- a/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanTask.kt
+++ b/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitScanTask.kt
@@ -25,7 +25,7 @@ class NumassFitScanTask : AbstractTask<FitResult>() {
 
 
     override fun run(model: TaskModel, data: DataNode<*>): DataNode<FitResult> {
-        val config = model.meta()
+        val config = model.getMeta()
         val scanParameter = config.getString("parameter", "msterile2")
 
         val scanValues: Value = if (config.hasValue("masses")) {
diff --git a/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitSummaryTask.kt b/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitSummaryTask.kt
index a1471914..a4f80c44 100644
--- a/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitSummaryTask.kt
+++ b/numass-main/src/main/kotlin/inr/numass/tasks/NumassFitSummaryTask.kt
@@ -42,7 +42,7 @@ class NumassFitSummaryTask : SingleActionTask<FitState, Table>() {
     }
 
     override fun transformMeta(model: TaskModel): Meta {
-        return model.meta().getMeta("summary")
+        return model.getMeta().getMeta("summary")
     }
 
     override fun buildModel(model: TaskModel.Builder, meta: Meta) {
diff --git a/numass-server/src/main/java/inr/numass/server/NumassRootHandler.java b/numass-server/src/main/java/inr/numass/server/NumassRootHandler.java
index f8a6abaf..6c40e804 100644
--- a/numass-server/src/main/java/inr/numass/server/NumassRootHandler.java
+++ b/numass-server/src/main/java/inr/numass/server/NumassRootHandler.java
@@ -44,8 +44,8 @@ public class NumassRootHandler implements Handler {
             Template template = ServletUtils.freemarkerConfig().getTemplate("NumassRoot.ftl");
 
             Map data = new HashMap(6);
-            if (!server.meta().isEmpty()) {
-                data.put("serverMeta", writer.writeString(server.meta()));
+            if (!server.getMeta().isEmpty()) {
+                data.put("serverMeta", writer.writeString(server.getMeta()));
             }
 
             if (server.getRootState() != null) {
@@ -54,8 +54,8 @@ public class NumassRootHandler implements Handler {
 
             if (server.getRun() != null) {
                 data.put("runPresent", true);
-                if (!server.getRun().meta().isEmpty()) {
-                    data.put("runMeta", writer.writeString(server.getRun().meta()));
+                if (!server.getRun().getMeta().isEmpty()) {
+                    data.put("runMeta", writer.writeString(server.getRun().getMeta()));
                 }
 
                 StateLoader runState = server.getRun().getStates();
diff --git a/numass-server/src/main/java/inr/numass/server/NumassRun.java b/numass-server/src/main/java/inr/numass/server/NumassRun.java
index a4225ca2..81d8b451 100644
--- a/numass-server/src/main/java/inr/numass/server/NumassRun.java
+++ b/numass-server/src/main/java/inr/numass/server/NumassRun.java
@@ -95,7 +95,7 @@ public class NumassRun implements Metoid, Responder {
 
     @Override
     public Envelope respond(Envelope message) {
-        Meta meta = message.meta();
+        Meta meta = message.getMeta();
         String type = meta.getString("type", "numass.run.state");
         String action = meta.getString("action");
         switch (type) {
@@ -135,12 +135,12 @@ public class NumassRun implements Metoid, Responder {
 
     private synchronized Envelope pushNote(Envelope message) {
         try {
-            if (message.meta().hasMeta("note")) {
-                for (Meta node : message.meta().getMetaList("note")) {
+            if (message.getMeta().hasMeta("note")) {
+                for (Meta node : message.getMeta().getMetaList("note")) {
                     addNote(NumassNote.buildFrom(node));
                 }
             } else {
-                addNote(NumassNote.buildFrom(message.meta()));
+                addNote(NumassNote.buildFrom(message.getMeta()));
             }
             return factory.okResponseBase(message, false, false).build();
         } catch (Exception ex) {
@@ -151,7 +151,7 @@ public class NumassRun implements Metoid, Responder {
 
     private Envelope pullNotes(Envelope message) {
         EnvelopeBuilder envelope = factory.okResponseBase(message, true, false);
-        int limit = message.meta().getInt("limit", -1);
+        int limit = message.getMeta().getInt("limit", -1);
         //TODO add time window and search conditions here
         Stream<NumassNote> stream = getNotes(noteLoader);
         if (limit > 0) {
@@ -164,8 +164,8 @@ public class NumassRun implements Metoid, Responder {
 
     private Envelope pushNumassPoint(Envelope message) {
         try {
-            String filePath = message.meta().getString("path", "");
-            String fileName = message.meta().getString("name")
+            String filePath = message.getMeta().getString("path", "");
+            String fileName = message.getMeta().getString("name")
                     .replace(NumassStorage.NUMASS_ZIP_EXTENSION, "");// removing .nm.zip if it is present
             if (storage instanceof NumassStorage) {
                 ((NumassStorage) storage).pushNumassData(filePath, fileName, message.getData().getBuffer());
@@ -181,8 +181,8 @@ public class NumassRun implements Metoid, Responder {
     }
 
     @Override
-    public Meta meta() {
-        return storage.meta();
+    public Meta getMeta() {
+        return storage.getMeta();
     }
 
     public Storage getStorage() {
diff --git a/numass-server/src/main/java/inr/numass/server/NumassServer.java b/numass-server/src/main/java/inr/numass/server/NumassServer.java
index 0ac97c44..977da72c 100644
--- a/numass-server/src/main/java/inr/numass/server/NumassServer.java
+++ b/numass-server/src/main/java/inr/numass/server/NumassServer.java
@@ -77,7 +77,7 @@ public class NumassServer extends AbstractNetworkListener implements ContextAwar
     @Override
     public void open() throws Exception {
         super.open();
-        int port = meta().getInt("ratpack.port", 8336);
+        int port = getMeta().getInt("ratpack.port", 8336);
 //        ratpack = RatpackServer.start((RatpackServerSpec server) -> server
 //                .serverConfig((ServerConfigBuilder config) -> config
 ////                        .baseDir(Paths.get(getClass().getResource("/ratpack/.ratpack").toURI()))
@@ -110,7 +110,7 @@ public class NumassServer extends AbstractNetworkListener implements ContextAwar
      */
     @Override
     public Envelope respond(Envelope message) {
-        Meta meta = message.meta();
+        Meta meta = message.getMeta();
 //        ByteBuffer data = message.getData();
 
         //switch message type
@@ -155,8 +155,8 @@ public class NumassServer extends AbstractNetworkListener implements ContextAwar
     public Envelope getCurrentRun() {
         MetaBuilder runAn = new MetaBuilder("run")
                 .putValue("path", getRun().getRunPath());
-        if (!run.meta().isEmpty()) {
-            runAn.putNode(getRun().meta());
+        if (!run.getMeta().isEmpty()) {
+            runAn.putNode(getRun().getMeta());
         }
 
         return getResponseFactory().responseBase("numass.run.response")
diff --git a/numass-server/src/main/java/inr/numass/server/ServerRunner.java b/numass-server/src/main/java/inr/numass/server/ServerRunner.java
index 1518475c..f6ae7b41 100644
--- a/numass-server/src/main/java/inr/numass/server/ServerRunner.java
+++ b/numass-server/src/main/java/inr/numass/server/ServerRunner.java
@@ -55,7 +55,7 @@ public class ServerRunner extends SimpleConfigurable implements AutoCloseable {
     public ServerRunner start() throws Exception {
 //        String repoPath = meta().getString(NUMASS_REPO_PATH_PROPERTY, ".");
 
-        Meta storageMeta = meta().getMetaOrEmpty(NUMASS_REPO_ELEMENT);
+        Meta storageMeta = getMeta().getMetaOrEmpty(NUMASS_REPO_ELEMENT);
         context.getLogger().info("Initializing file storage with meta: {}",storageMeta);
         root = new NumassStorage(context,storageMeta);
 
@@ -63,8 +63,8 @@ public class ServerRunner extends SimpleConfigurable implements AutoCloseable {
         if (root != null) {
             root.open();
             Meta listenerConfig = null;
-            if (meta().hasMeta(LISTENER_ELEMENT)) {
-                listenerConfig = meta().getMeta(LISTENER_ELEMENT);
+            if (getMeta().hasMeta(LISTENER_ELEMENT)) {
+                listenerConfig = getMeta().getMeta(LISTENER_ELEMENT);
             }
 
             listener = new NumassServer(root, listenerConfig);
diff --git a/numass-test/src/main/groovy/inr/numass/scripts/TestStorageAccess.groovy b/numass-test/src/main/groovy/inr/numass/scripts/TestStorageAccess.groovy
index 8d0f516e..21850ad8 100644
--- a/numass-test/src/main/groovy/inr/numass/scripts/TestStorageAccess.groovy
+++ b/numass-test/src/main/groovy/inr/numass/scripts/TestStorageAccess.groovy
@@ -51,6 +51,6 @@ new NumassClient("127.0.0.1",8335).withCloseable{
     
     def response = it.respond(bin);
     
-    println parser.writeString(response.meta());
+    println parser.writeString(response.getMeta());
 
 }
\ No newline at end of file
diff --git a/numass-viewer/src/main/kotlin/inr/numass/viewer/NumassDataCache.kt b/numass-viewer/src/main/kotlin/inr/numass/viewer/NumassDataCache.kt
index 78468b20..c9988efb 100644
--- a/numass-viewer/src/main/kotlin/inr/numass/viewer/NumassDataCache.kt
+++ b/numass-viewer/src/main/kotlin/inr/numass/viewer/NumassDataCache.kt
@@ -27,7 +27,7 @@ class NumassDataCache(val data: NumassSet) : NumassSet {
         return cachedDescription
     }
 
-    override fun meta(): Meta {
+    override fun getMeta(): Meta {
         return cachedMeta
     }
 
diff --git a/numass-viewer/src/main/resources/img/df.png b/numass-viewer/src/main/resources/img/df.png
deleted file mode 100644
index 076e26a2..00000000
Binary files a/numass-viewer/src/main/resources/img/df.png and /dev/null differ
diff --git a/numass-web/src/main/kotlin/inr/numass/server/Interceptors.kt b/numass-web/src/main/kotlin/inr/numass/server/Interceptors.kt
index 009d7d15..0167b59b 100644
--- a/numass-web/src/main/kotlin/inr/numass/server/Interceptors.kt
+++ b/numass-web/src/main/kotlin/inr/numass/server/Interceptors.kt
@@ -46,7 +46,7 @@ val storageInterceptor = InterceptorFactory { context, meta ->
                             add("name", loader.name)
                             add("path", loader.path.toString())
                             add("type", loader.type)
-                            add("meta", loader.laminate.asJson())
+                            add("getMeta", loader.laminate.asJson())
                         })
                     }
                     add("loaders", loaders)
@@ -96,7 +96,7 @@ val deviceInterceptor = InterceptorFactory { context, meta ->
                     devices.add(jsonObject {
                         add("name", name.toUnescaped())
                         add("type", device.getType())
-                        add("meta", device.meta.asJson())
+                        add("getMeta", device.meta.asJson())
                     })
                 }
             }
@@ -112,7 +112,7 @@ val deviceInterceptor = InterceptorFactory { context, meta ->
                     call.json {
                         add("name", deviceName)
                         add("type", device.type)
-                        add("meta", device.meta.asJson())
+                        add("getMeta", device.meta.asJson())
                         add("state", jsonObject {
                             for (state in device.listStates()) {
                                 add(state, device.getState(state).toString())