diff --git a/build.gradle.kts b/build.gradle.kts
index 425d02f..c3e655d 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -12,7 +12,7 @@ allprojects {
     }
 }
 
-val dataforgeVersion by extra("0.6.1-dev-4")
+val dataforgeVersion by extra("0.6.1-dev-6")
 
 ksciencePublish {
     github("SciProgCentre", "snark")
diff --git a/gradle.properties b/gradle.properties
index bdedf81..cc14d8b 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,3 @@
 kotlin.code.style=official
 
-toolsVersion=0.14.2-kotlin-1.8.10
\ No newline at end of file
+toolsVersion=0.14.5-kotlin-1.8.20-RC
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 070cb70..e1bef7e 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 5c36ba3..87d8990 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,7 +1,7 @@
 rootProject.name = "snark"
 
 enableFeaturePreview("TYPESAFE_PROJECT_ACCESSORS")
-enableFeaturePreview("VERSION_CATALOGS")
+//enableFeaturePreview("VERSION_CATALOGS")
 
 pluginManagement {
 
diff --git a/snark-core/src/commonMain/kotlin/space/kscience/snark/SnarkBuilder.kt b/snark-core/src/commonMain/kotlin/space/kscience/snark/SnarkBuilder.kt
new file mode 100644
index 0000000..bb0844e
--- /dev/null
+++ b/snark-core/src/commonMain/kotlin/space/kscience/snark/SnarkBuilder.kt
@@ -0,0 +1,4 @@
+package space.kscience.snark
+
+@DslMarker
+public annotation class SnarkBuilder
diff --git a/snark-core/src/commonMain/kotlin/space/kscience/snark/SnarkContext.kt b/snark-core/src/commonMain/kotlin/space/kscience/snark/SnarkContext.kt
index 374d2cc..2f637cd 100644
--- a/snark-core/src/commonMain/kotlin/space/kscience/snark/SnarkContext.kt
+++ b/snark-core/src/commonMain/kotlin/space/kscience/snark/SnarkContext.kt
@@ -3,4 +3,5 @@ package space.kscience.snark
 /**
  * A marker interface for Snark Page and Site builders
  */
+@SnarkBuilder
 public interface SnarkContext
\ No newline at end of file
diff --git a/snark-core/src/commonMain/kotlin/space/kscience/snark/SnarkEnvironment.kt b/snark-core/src/commonMain/kotlin/space/kscience/snark/SnarkEnvironment.kt
deleted file mode 100644
index 2f155bc..0000000
--- a/snark-core/src/commonMain/kotlin/space/kscience/snark/SnarkEnvironment.kt
+++ /dev/null
@@ -1,40 +0,0 @@
-package space.kscience.snark
-
-import space.kscience.dataforge.context.Context
-import space.kscience.dataforge.context.Global
-import space.kscience.dataforge.context.Plugin
-import space.kscience.dataforge.data.DataSourceBuilder
-import space.kscience.dataforge.data.DataTree
-import space.kscience.dataforge.data.DataTreeBuilder
-import space.kscience.dataforge.meta.MutableMeta
-import kotlin.reflect.typeOf
-
-public class SnarkEnvironment(public val parentContext: Context) {
-    private var _data: DataTree<*>? = null
-    public val data: DataTree<Any> get() = _data ?: DataTree.empty()
-
-    public fun data(builder: DataSourceBuilder<Any>.() -> Unit) {
-        _data = DataTreeBuilder<Any>(typeOf<Any>(), parentContext.coroutineContext).apply(builder)
-        //TODO use node meta
-    }
-
-    public val meta: MutableMeta = MutableMeta()
-
-    public fun meta(block: MutableMeta.() -> Unit) {
-        meta.apply(block)
-    }
-
-    private val _plugins = HashSet<Plugin>()
-    public val plugins: Set<Plugin> get() = _plugins
-
-    public fun registerPlugin(plugin: Plugin) {
-        _plugins.add(plugin)
-    }
-
-    public companion object{
-        public val default: SnarkEnvironment = SnarkEnvironment(Global)
-    }
-}
-
-public fun SnarkEnvironment(parentContext: Context = Global, block: SnarkEnvironment.() -> Unit): SnarkEnvironment =
-    SnarkEnvironment(parentContext).apply(block)
diff --git a/snark-html/src/main/kotlin/space/kscience/snark/html/ImageIOReader.kt b/snark-html/src/main/kotlin/space/kscience/snark/html/ImageIOReader.kt
new file mode 100644
index 0000000..84d52e5
--- /dev/null
+++ b/snark-html/src/main/kotlin/space/kscience/snark/html/ImageIOReader.kt
@@ -0,0 +1,15 @@
+package space.kscience.snark.html
+
+import io.ktor.util.asStream
+import io.ktor.utils.io.core.Input
+import space.kscience.dataforge.io.IOReader
+import java.awt.image.BufferedImage
+import javax.imageio.ImageIO
+import kotlin.reflect.KType
+import kotlin.reflect.typeOf
+
+internal object ImageIOReader : IOReader<BufferedImage> {
+    override val type: KType get() = typeOf<BufferedImage>()
+
+    override fun readObject(input: Input): BufferedImage = ImageIO.read(input.asStream())
+}
\ No newline at end of file
diff --git a/snark-html/src/main/kotlin/space/kscience/snark/html/Language.kt b/snark-html/src/main/kotlin/space/kscience/snark/html/Language.kt
index 4d2ef15..3dd1893 100644
--- a/snark-html/src/main/kotlin/space/kscience/snark/html/Language.kt
+++ b/snark-html/src/main/kotlin/space/kscience/snark/html/Language.kt
@@ -3,6 +3,7 @@ package space.kscience.snark.html
 import space.kscience.dataforge.data.getItem
 import space.kscience.dataforge.meta.*
 import space.kscience.dataforge.names.*
+import space.kscience.snark.SnarkBuilder
 import space.kscience.snark.html.Language.Companion.SITE_LANGUAGES_KEY
 import space.kscience.snark.html.Language.Companion.SITE_LANGUAGE_KEY
 
@@ -46,7 +47,7 @@ public class Language : Scheme() {
         context(SiteBuilder)
         public fun forName(name: Name): Meta = Meta {
             val currentLanguagePrefix = languages[language]?.get(Language::prefix.name)?.string ?: language
-            val fullName = (route.removeHeadOrNull(currentLanguagePrefix.asName()) ?: route) + name
+            val fullName = (route.removeFirstOrNull(currentLanguagePrefix.asName()) ?: route) + name
             languages.forEach { (key, meta) ->
                 val languagePrefix: String = meta[Language::prefix.name].string ?: key
                 val nameWithLanguage: Name = if (languagePrefix.isBlank()) {
@@ -90,6 +91,7 @@ public fun SiteBuilder.withLanguages(languageMap: Map<String, Meta>, block: Site
     }
 }
 
+@SnarkBuilder
 public fun SiteBuilder.withLanguages(
     vararg language: Pair<String, String>,
     block: SiteBuilder.(language: String) -> Unit,
diff --git a/snark-html/src/main/kotlin/space/kscience/snark/html/SiteBuilder.kt b/snark-html/src/main/kotlin/space/kscience/snark/html/SiteBuilder.kt
index 677bf92..89ba1bd 100644
--- a/snark-html/src/main/kotlin/space/kscience/snark/html/SiteBuilder.kt
+++ b/snark-html/src/main/kotlin/space/kscience/snark/html/SiteBuilder.kt
@@ -5,6 +5,7 @@ import space.kscience.dataforge.context.Context
 import space.kscience.dataforge.context.ContextAware
 import space.kscience.dataforge.data.DataTree
 import space.kscience.dataforge.data.DataTreeItem
+import space.kscience.dataforge.data.branch
 import space.kscience.dataforge.data.getItem
 import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.get
@@ -14,6 +15,7 @@ import space.kscience.dataforge.names.Name
 import space.kscience.dataforge.names.NameToken
 import space.kscience.dataforge.names.asName
 import space.kscience.dataforge.names.parseAsName
+import space.kscience.snark.SnarkBuilder
 import space.kscience.snark.SnarkContext
 import space.kscience.snark.html.SiteLayout.Companion.LAYOUT_KEY
 
@@ -21,6 +23,7 @@ import space.kscience.snark.html.SiteLayout.Companion.LAYOUT_KEY
 /**
  * An abstraction, which is used to render sites to the different rendering engines
  */
+@SnarkBuilder
 public interface SiteBuilder : ContextAware, SnarkContext {
 
     /**
@@ -48,29 +51,16 @@ public interface SiteBuilder : ContextAware, SnarkContext {
     /**
      * Serve a static data as a file from [data] with given [dataName] at given [routeName].
      */
-    public fun file(dataName: Name, routeName: Name = dataName)
-//
-//    /**
-//     * Add a static file or directory to this site/route at [webPath]
-//     */
-//    public fun file(file: Path, webPath: String = file.fileName.toString())
-//
-//    /**
-//     * Add a static file (single) from resources
-//     */
-//    public fun resourceFile(resourcesPath: String, webPath: String = resourcesPath)
-//
-//    /**
-//     * Add a resource directory to route
-//     */
-//    public fun resourceDirectory(resourcesPath: String)
+    public fun static(dataName: Name, routeName: Name = dataName)
+
 
     /**
      * Create a single page at given [route]. If route is empty, create an index page at current route.
      *
      * @param pageMeta additional page meta. [WebPage] will use both it and [siteMeta]
      */
-    public fun page(route: Name = Name.EMPTY, pageMeta: Meta = Meta.EMPTY, content: context(WebPage, HTML) () -> Unit)
+    @SnarkBuilder
+    public fun page(route: Name = Name.EMPTY, pageMeta: Meta = Meta.EMPTY, content: context(HTML, WebPage) () -> Unit)
 
     /**
      * Create a route with optional data tree override. For example one could use a subtree of the initial tree.
@@ -100,9 +90,10 @@ public interface SiteBuilder : ContextAware, SnarkContext {
 }
 
 context(SiteBuilder)
-public val siteBuilder: SiteBuilder
+public val site: SiteBuilder
     get() = this@SiteBuilder
 
+@SnarkBuilder
 public inline fun SiteBuilder.route(
     route: Name,
     dataOverride: DataTree<*>? = null,
@@ -112,6 +103,7 @@ public inline fun SiteBuilder.route(
     route(route, dataOverride, routeMeta).apply(block)
 }
 
+@SnarkBuilder
 public inline fun SiteBuilder.route(
     route: String,
     dataOverride: DataTree<*>? = null,
@@ -121,6 +113,7 @@ public inline fun SiteBuilder.route(
     route(route.parseAsName(), dataOverride, routeMeta).apply(block)
 }
 
+@SnarkBuilder
 public inline fun SiteBuilder.site(
     route: Name,
     dataOverride: DataTree<*>? = null,
@@ -130,6 +123,7 @@ public inline fun SiteBuilder.site(
     site(route, dataOverride, routeMeta).apply(block)
 }
 
+@SnarkBuilder
 public inline fun SiteBuilder.site(
     route: String,
     dataOverride: DataTree<*>? = null,
@@ -139,6 +133,26 @@ public inline fun SiteBuilder.site(
     site(route.parseAsName(), dataOverride, routeMeta).apply(block)
 }
 
+public inline fun SiteBuilder.withData(
+    data: DataTree<*>,
+    block: SiteBuilder.() -> Unit
+){
+    route(Name.EMPTY, data).apply(block)
+}
+
+public inline fun SiteBuilder.withDataBranch(
+    name: Name,
+    block: SiteBuilder.() -> Unit
+){
+    route(Name.EMPTY, data.branch(name)).apply(block)
+}
+
+public inline fun SiteBuilder.withDataBranch(
+    name: String,
+    block: SiteBuilder.() -> Unit
+){
+    route(Name.EMPTY, data.branch(name)).apply(block)
+}
 
 ///**
 // * Create a stand-alone site at a given node
@@ -154,14 +168,19 @@ public inline fun SiteBuilder.site(
 //    }
 //}
 
+public fun SiteBuilder.static(dataName: String): Unit = static(dataName.parseAsName())
 
+public fun SiteBuilder.static(dataName: String, routeName: String): Unit = static(
+    dataName.parseAsName(),
+    routeName.parseAsName()
+)
 
 internal fun SiteBuilder.assetsFrom(rootMeta: Meta) {
     rootMeta.getIndexed("file".asName()).forEach { (_, meta) ->
         val webName: String? by meta.string()
         val name by meta.string { error("File path is not provided") }
         val fileName = name.parseAsName()
-        file(fileName, webName?.parseAsName() ?: fileName)
+        static(fileName, webName?.parseAsName() ?: fileName)
     }
 }
 
diff --git a/snark-html/src/main/kotlin/space/kscience/snark/html/SnarkHtmlPlugin.kt b/snark-html/src/main/kotlin/space/kscience/snark/html/SnarkHtmlPlugin.kt
index a287c6e..ec5c23e 100644
--- a/snark-html/src/main/kotlin/space/kscience/snark/html/SnarkHtmlPlugin.kt
+++ b/snark-html/src/main/kotlin/space/kscience/snark/html/SnarkHtmlPlugin.kt
@@ -3,6 +3,7 @@ package space.kscience.snark.html
 import io.ktor.utils.io.core.readBytes
 import space.kscience.dataforge.context.*
 import space.kscience.dataforge.data.DataTree
+import space.kscience.dataforge.io.IOFormat
 import space.kscience.dataforge.io.IOPlugin
 import space.kscience.dataforge.io.IOReader
 import space.kscience.dataforge.io.JsonMetaFormat
@@ -17,7 +18,6 @@ import space.kscience.dataforge.names.asName
 import space.kscience.dataforge.names.parseAsName
 import space.kscience.dataforge.workspace.FileData
 import space.kscience.dataforge.workspace.readDataDirectory
-import space.kscience.snark.SnarkEnvironment
 import space.kscience.snark.SnarkParser
 import java.nio.file.Path
 import kotlin.io.path.extension
@@ -66,16 +66,19 @@ public class SnarkHtmlPlugin : AbstractPlugin() {
             "png".asName() to SnarkParser(ImageIOReader, "png"),
             "jpg".asName() to SnarkParser(ImageIOReader, "jpg", "jpeg"),
             "gif".asName() to SnarkParser(ImageIOReader, "gif"),
+            "svg".asName() to SnarkParser(IOReader.binary, "svg"),
+            "raw".asName() to SnarkParser(IOReader.binary, "css", "js", "scss", "woff", "woff2", "ttf", "eot")
         )
+
         TextProcessor.TYPE -> mapOf(
             "basic".asName() to BasicTextProcessor
         )
+
         else -> super.content(target)
     }
 
     public companion object : PluginFactory<SnarkHtmlPlugin> {
         override val tag: PluginTag = PluginTag("snark")
-        override val type: KClass<out SnarkHtmlPlugin> = SnarkHtmlPlugin::class
 
         override fun build(context: Context, meta: Meta): SnarkHtmlPlugin = SnarkHtmlPlugin()
 
@@ -87,30 +90,28 @@ public class SnarkHtmlPlugin : AbstractPlugin() {
     }
 }
 
-/**
- * Load necessary dependencies and return a [SnarkHtmlPlugin] in a finalized context
- */
-public fun SnarkEnvironment.buildHtmlPlugin(): SnarkHtmlPlugin {
-    val context = parentContext.buildContext("snark".asName()) {
-        plugin(SnarkHtmlPlugin)
-        plugins.forEach {
-            plugin(it)
-        }
-    }
-    return context.request(SnarkHtmlPlugin)
-}
-
 @OptIn(DFExperimental::class)
-public fun SnarkHtmlPlugin.readDirectory(path: Path): DataTree<Any> = io.readDataDirectory(path) { dataPath, meta ->
+public fun SnarkHtmlPlugin.readDirectory(path: Path): DataTree<Any> = io.readDataDirectory(path, setOf("md","html")) { dataPath, meta ->
     val fileExtension = meta[FileData.FILE_EXTENSION_KEY].string ?: dataPath.extension
     val parser: SnarkParser<Any> = parsers.values.filter { parser ->
         fileExtension in parser.fileExtensions
     }.maxByOrNull {
         it.priority
     } ?: run {
-        logger.warn { "The parser is not found for file $dataPath with meta $meta" }
+        logger.debug { "The parser is not found for file $dataPath with meta $meta" }
         SnarkHtmlPlugin.byteArraySnarkParser
     }
 
     parser.asReader(context, meta)
-}
\ No newline at end of file
+}
+
+public fun SnarkHtmlPlugin.readResourceDirectory(
+    resource: String = "",
+    classLoader: ClassLoader = SnarkHtmlPlugin::class.java.classLoader,
+): DataTree<Any> = readDirectory(
+    Path.of(
+        classLoader.getResource(resource)?.toURI() ?: error(
+            "Resource with name $resource is not resolved"
+        )
+    )
+)
\ No newline at end of file
diff --git a/snark-html/src/main/kotlin/space/kscience/snark/html/SnarkTextParser.kt b/snark-html/src/main/kotlin/space/kscience/snark/html/SnarkTextParser.kt
index f03dc41..0d872d4 100644
--- a/snark-html/src/main/kotlin/space/kscience/snark/html/SnarkTextParser.kt
+++ b/snark-html/src/main/kotlin/space/kscience/snark/html/SnarkTextParser.kt
@@ -1,19 +1,14 @@
 package space.kscience.snark.html
 
-import io.ktor.util.asStream
-import io.ktor.utils.io.core.Input
 import kotlinx.html.div
 import kotlinx.html.unsafe
 import org.intellij.markdown.flavours.commonmark.CommonMarkFlavourDescriptor
 import org.intellij.markdown.html.HtmlGenerator
 import org.intellij.markdown.parser.MarkdownParser
 import space.kscience.dataforge.context.Context
-import space.kscience.dataforge.io.IOReader
 import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.get
 import space.kscience.snark.SnarkParser
-import java.awt.image.BufferedImage
-import javax.imageio.ImageIO
 import kotlin.reflect.KType
 import kotlin.reflect.typeOf
 
@@ -61,8 +56,3 @@ internal object SnarkMarkdownParser : SnarkTextParser<HtmlFragment>() {
     }
 }
 
-internal object ImageIOReader : IOReader<BufferedImage> {
-    override val type: KType get() = typeOf<BufferedImage>()
-
-    override fun readObject(input: Input): BufferedImage = ImageIO.read(input.asStream())
-}
diff --git a/snark-html/src/main/kotlin/space/kscience/snark/html/StaticSiteBuilder.kt b/snark-html/src/main/kotlin/space/kscience/snark/html/StaticSiteBuilder.kt
index fa7c04f..b1dbdbe 100644
--- a/snark-html/src/main/kotlin/space/kscience/snark/html/StaticSiteBuilder.kt
+++ b/snark-html/src/main/kotlin/space/kscience/snark/html/StaticSiteBuilder.kt
@@ -10,7 +10,6 @@ import space.kscience.dataforge.meta.toMutableMeta
 import space.kscience.dataforge.names.Name
 import space.kscience.dataforge.names.isEmpty
 import space.kscience.dataforge.names.plus
-import space.kscience.snark.SnarkEnvironment
 import java.nio.file.Files
 import java.nio.file.Path
 import kotlin.contracts.InvocationKind
@@ -30,7 +29,7 @@ internal class StaticSiteBuilder(
     private val outputPath: Path,
 ) : SiteBuilder {
 
-    override fun file(dataName: Name, routeName: Name) {
+    override fun static(dataName: Name, routeName: Name) {
         TODO("Not yet implemented")
     }
 
@@ -82,15 +81,16 @@ internal class StaticSiteBuilder(
         override val snark: SnarkHtmlPlugin get() = this@StaticSiteBuilder.snark
 
 
-        override fun resolveRef(ref: String): String = resolveRef(baseUrl, ref)
+        override fun resolveRef(ref: String): String =
+            this@StaticSiteBuilder.resolveRef(this@StaticSiteBuilder.baseUrl, ref)
 
         override fun resolvePageRef(pageName: Name, relative: Boolean): String = resolveRef(
-            (if (relative) route + pageName else pageName).toWebPath() + ".html"
+            (if (relative) this@StaticSiteBuilder.route + pageName else pageName).toWebPath() + ".html"
         )
     }
 
 
-    override fun page(route: Name, pageMeta: Meta, content: context(WebPage, HTML) () -> Unit) {
+    override fun page(route: Name, pageMeta: Meta, content: context(HTML) WebPage.() -> Unit) {
         val htmlBuilder = createHTML()
 
         val modifiedPageMeta = pageMeta.toMutableMeta().apply {
@@ -98,7 +98,7 @@ internal class StaticSiteBuilder(
         }
 
         htmlBuilder.html {
-            content(StaticWebPage(Laminate(modifiedPageMeta, siteMeta)), this)
+            content(this, StaticWebPage(Laminate(modifiedPageMeta, siteMeta)))
         }
 
         val newPath = if (route.isEmpty()) {
@@ -132,7 +132,7 @@ internal class StaticSiteBuilder(
         snark = snark,
         data = dataOverride ?: data,
         siteMeta = Laminate(routeMeta, siteMeta),
-        baseUrl = if(baseUrl == "") "" else resolveRef(baseUrl, routeName.toWebPath()),
+        baseUrl = if (baseUrl == "") "" else resolveRef(baseUrl, routeName.toWebPath()),
         route = Name.EMPTY,
         outputPath = outputPath.resolve(routeName.toWebPath())
     )
@@ -143,14 +143,15 @@ internal class StaticSiteBuilder(
  * Use [siteUrl] as a base for all resolved URLs. By default, use [outputPath] absolute path as a base.
  *
  */
-public fun SnarkEnvironment.static(
+public fun SnarkHtmlPlugin.static(
+    data: DataTree<*>,
     outputPath: Path,
     siteUrl: String = outputPath.absolutePathString().replace("\\", "/"),
+    siteMeta: Meta = data.meta,
     block: SiteBuilder.() -> Unit,
 ) {
     contract {
         callsInPlace(block, InvocationKind.EXACTLY_ONCE)
     }
-    val plugin = buildHtmlPlugin()
-    StaticSiteBuilder(plugin, data, meta, siteUrl, Name.EMPTY, outputPath).block()
+    StaticSiteBuilder(this, data, siteMeta, siteUrl, Name.EMPTY, outputPath).block()
 }
\ No newline at end of file
diff --git a/snark-html/src/main/kotlin/space/kscience/snark/html/WebPage.kt b/snark-html/src/main/kotlin/space/kscience/snark/html/WebPage.kt
index 2e39158..77b2fef 100644
--- a/snark-html/src/main/kotlin/space/kscience/snark/html/WebPage.kt
+++ b/snark-html/src/main/kotlin/space/kscience/snark/html/WebPage.kt
@@ -7,6 +7,7 @@ import space.kscience.dataforge.meta.Meta
 import space.kscience.dataforge.meta.get
 import space.kscience.dataforge.meta.string
 import space.kscience.dataforge.names.*
+import space.kscience.snark.SnarkBuilder
 import space.kscience.snark.SnarkContext
 
 context(SnarkContext)
@@ -21,6 +22,7 @@ public fun Name.toWebPath(): String = tokens.joinToString(separator = "/") {
 /**
  *  A context for building a single page
  */
+@SnarkBuilder
 public interface WebPage : ContextAware, SnarkContext {
 
     public val snark: SnarkHtmlPlugin
@@ -62,7 +64,7 @@ public val WebPage.name: Name? get() = pageMeta["name"].string?.parseAsName()
  * Resolve a Html builder by its full name
  */
 context(SnarkContext)
-public fun DataTree<*>.resolveHtml(name: Name): HtmlData? {
+public fun DataTree<*>.resolveHtmlOrNull(name: Name): HtmlData? {
     val resolved = (getByType<HtmlFragment>(name) ?: getByType<HtmlFragment>(name + SiteBuilder.INDEX_PAGE_TOKEN))
 
     return resolved?.takeIf {
@@ -71,7 +73,11 @@ public fun DataTree<*>.resolveHtml(name: Name): HtmlData? {
 }
 
 context(SnarkContext)
-public fun DataTree<*>.resolveHtml(name: String): HtmlData? = resolveHtml(name.parseAsName())
+public fun DataTree<*>.resolveHtmlOrNull(name: String): HtmlData? = resolveHtmlOrNull(name.parseAsName())
+
+context(SnarkContext)
+public fun DataTree<*>.resolveHtml(name: String): HtmlData = resolveHtmlOrNull(name)
+    ?: error("Html fragment with name $name is not resolved")
 
 /**
  * Find all Html blocks using given name/meta filter
diff --git a/snark-html/src/main/kotlin/space/kscience/snark/html/htmlEnvironment.kt b/snark-html/src/main/kotlin/space/kscience/snark/html/htmlEnvironment.kt
index 0989398..0772f20 100644
--- a/snark-html/src/main/kotlin/space/kscience/snark/html/htmlEnvironment.kt
+++ b/snark-html/src/main/kotlin/space/kscience/snark/html/htmlEnvironment.kt
@@ -1,42 +1,37 @@
 package space.kscience.snark.html
 
-import space.kscience.dataforge.context.AbstractPlugin
-import space.kscience.dataforge.context.PluginTag
 import space.kscience.dataforge.data.DataTreeItem
 import space.kscience.dataforge.names.Name
 import space.kscience.dataforge.names.parseAsName
-import space.kscience.snark.SnarkEnvironment
-import kotlin.contracts.InvocationKind
-import kotlin.contracts.contract
 
 public class SnarkHtmlEnvironmentBuilder {
     public val layouts: HashMap<Name, SiteLayout> = HashMap()
 
     public fun layout(name: String, body: context(SiteBuilder) (DataTreeItem<*>) -> Unit) {
         layouts[name.parseAsName()] = object : SiteLayout {
-            context(SiteBuilder) override fun render(item: DataTreeItem<*>) = body(siteBuilder, item)
+            context(SiteBuilder) override fun render(item: DataTreeItem<*>) = body(site, item)
         }
     }
 }
 
 
-public fun SnarkEnvironment.html(block: SnarkHtmlEnvironmentBuilder.() -> Unit) {
-    contract {
-        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
-    }
-
-    val envBuilder = SnarkHtmlEnvironmentBuilder().apply(block)
-
-    val plugin = object : AbstractPlugin() {
-        val snark by require(SnarkHtmlPlugin)
-
-        override val tag: PluginTag = PluginTag("@extension[${hashCode()}]")
-
-
-        override fun content(target: String): Map<Name, Any> = when (target) {
-            SiteLayout.TYPE -> envBuilder.layouts
-            else -> super.content(target)
-        }
-    }
-    registerPlugin(plugin)
-}
\ No newline at end of file
+//public fun SnarkEnvironment.html(block: SnarkHtmlEnvironmentBuilder.() -> Unit) {
+//    contract {
+//        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+//    }
+//
+//    val envBuilder = SnarkHtmlEnvironmentBuilder().apply(block)
+//
+//    val plugin = object : AbstractPlugin() {
+//        val snark by require(SnarkHtmlPlugin)
+//
+//        override val tag: PluginTag = PluginTag("@extension[${hashCode()}]")
+//
+//
+//        override fun content(target: String): Map<Name, Any> = when (target) {
+//            SiteLayout.TYPE -> envBuilder.layouts
+//            else -> super.content(target)
+//        }
+//    }
+//    registerPlugin(plugin)
+//}
\ No newline at end of file
diff --git a/snark-ktor/src/main/kotlin/space/kscience/snark/ktor/KtorSiteBuilder.kt b/snark-ktor/src/main/kotlin/space/kscience/snark/ktor/KtorSiteBuilder.kt
index 56548d7..e69f070 100644
--- a/snark-ktor/src/main/kotlin/space/kscience/snark/ktor/KtorSiteBuilder.kt
+++ b/snark-ktor/src/main/kotlin/space/kscience/snark/ktor/KtorSiteBuilder.kt
@@ -20,6 +20,8 @@ import kotlinx.css.CssBuilder
 import kotlinx.html.CommonAttributeGroupFacade
 import kotlinx.html.HTML
 import kotlinx.html.style
+import space.kscience.dataforge.context.error
+import space.kscience.dataforge.context.logger
 import space.kscience.dataforge.data.DataTree
 import space.kscience.dataforge.data.DataTreeItem
 import space.kscience.dataforge.data.await
@@ -32,8 +34,10 @@ import space.kscience.dataforge.names.cutLast
 import space.kscience.dataforge.names.endsWith
 import space.kscience.dataforge.names.plus
 import space.kscience.dataforge.workspace.FileData
-import space.kscience.snark.SnarkEnvironment
-import space.kscience.snark.html.*
+import space.kscience.snark.html.SiteBuilder
+import space.kscience.snark.html.SnarkHtmlPlugin
+import space.kscience.snark.html.WebPage
+import space.kscience.snark.html.toWebPath
 import java.nio.file.Path
 import kotlin.contracts.InvocationKind
 import kotlin.contracts.contract
@@ -52,34 +56,35 @@ public class KtorSiteBuilder(
     private val ktorRoute: Route,
 ) : SiteBuilder {
 
-    private fun file(item: DataTreeItem<Any>, routeName: Name) {
-        val extension = item.meta[FileData.FILE_EXTENSION_KEY]?.string?.let { ".$it" } ?: ""
-
+    private fun files(item: DataTreeItem<Any>, routeName: Name) {
         //try using direct file rendering
         item.meta[FileData.FILE_PATH_KEY]?.string?.let {
-            try {
-                val file = Path.of(it).toFile()
-                if (file.isDirectory) {
-                    ktorRoute.static(routeName.toWebPath()) {
-                        files(file)
-                    }
-                } else {
-                    val fileName = routeName.toWebPath() + extension //TODO add extension
-                    ktorRoute.file(fileName, file)
-                }
-                //success, don't do anything else
-                return@file
+            val file = try {
+                Path.of(it).toFile()
             } catch (ex: Exception) {
                 //failure,
+                logger.error { "File $it could not be converted to java.io.File"}
                 return@let
             }
+
+            if (file.isDirectory) {
+                ktorRoute.static(routeName.toWebPath()) {
+                    files(file)
+                }
+            } else {
+                val fileName = routeName.toWebPath()
+                ktorRoute.file(fileName, file)
+            }
+            //success, don't do anything else
+            return@files
         }
         when (item) {
             is DataTreeItem.Leaf -> {
                 val datum = item.data
                 if (datum.type != typeOf<Binary>()) error("Can't directly serve file of type ${item.data.type}")
-                ktorRoute.get(routeName.toWebPath() + extension) {
+                ktorRoute.get(routeName.toWebPath()) {
                     val binary = datum.await() as Binary
+                    val extension = item.meta[FileData.FILE_EXTENSION_KEY]?.string?.let { ".$it" } ?: ""
                     val contentType: ContentType = extension
                         .let(ContentType::fromFileExtension)
                         .firstOrNull()
@@ -93,15 +98,15 @@ public class KtorSiteBuilder(
 
             is DataTreeItem.Node -> {
                 item.tree.items.forEach { (token, childItem) ->
-                    file(childItem, routeName + token)
+                    files(childItem, routeName + token)
                 }
             }
         }
     }
 
-    override fun file(dataName: Name, routeName: Name) {
-        val item: DataTreeItem<Any> = data.getItem(dataName) ?: error("Data with name is not resolved")
-        file(item, routeName)
+    override fun static(dataName: Name, routeName: Name) {
+        val item: DataTreeItem<Any> = data.getItem(dataName) ?: error("Data with name $dataName is not resolved")
+        files(item, routeName)
     }
 //
 //    override fun file(file: Path, webPath: String) {
@@ -140,13 +145,13 @@ public class KtorSiteBuilder(
         override val snark: SnarkHtmlPlugin get() = this@KtorSiteBuilder.snark
         override val data: DataTree<*> get() = this@KtorSiteBuilder.data
 
-        override fun resolveRef(ref: String): String = resolveRef(pageBaseUrl, ref)
+        override fun resolveRef(ref: String): String = this@KtorSiteBuilder.resolveRef(pageBaseUrl, ref)
 
         override fun resolvePageRef(
             pageName: Name,
             relative: Boolean,
         ): String {
-            val fullPageName = if (relative) route + pageName else pageName
+            val fullPageName = if (relative) this@KtorSiteBuilder.route + pageName else pageName
             return if (fullPageName.endsWith(SiteBuilder.INDEX_PAGE_TOKEN)) {
                 resolveRef(fullPageName.cutLast().toWebPath())
             } else {
@@ -155,7 +160,7 @@ public class KtorSiteBuilder(
         }
     }
 
-    override fun page(route: Name, pageMeta: Meta, content: context(WebPage, HTML)() -> Unit) {
+    override fun page(route: Name, pageMeta: Meta, content: context(HTML, WebPage) () -> Unit) {
         ktorRoute.get(route.toWebPath()) {
             call.respondHtml {
                 val request = call.request
@@ -172,7 +177,7 @@ public class KtorSiteBuilder(
                 }
 
                 val pageBuilder = KtorWebPage(url.buildString(), Laminate(modifiedPageMeta, siteMeta))
-                content(pageBuilder, this)
+                content(this, pageBuilder)
             }
         }
     }
@@ -213,26 +218,30 @@ public class KtorSiteBuilder(
 //    }
 }
 
-context(Route, SnarkEnvironment)
-private fun siteInRoute(
+private fun Route.site(
+    snarkHtmlPlugin: SnarkHtmlPlugin,
+    data: DataTree<*>,
     baseUrl: String = "",
+    siteMeta: Meta = data.meta,
     block: KtorSiteBuilder.() -> Unit,
 ) {
     contract {
         callsInPlace(block, InvocationKind.EXACTLY_ONCE)
     }
-    block(KtorSiteBuilder(buildHtmlPlugin(), data, meta, baseUrl, route = Name.EMPTY, this@Route))
+    block(KtorSiteBuilder(snarkHtmlPlugin, data, siteMeta, baseUrl, route = Name.EMPTY, this@Route))
 }
 
-context(Application)
-public fun SnarkEnvironment.site(
+public fun Application.site(
+    snark: SnarkHtmlPlugin,
+    data: DataTree<*>,
     baseUrl: String = "",
-    block: KtorSiteBuilder.() -> Unit,
+    siteMeta: Meta = data.meta,
+    block: SiteBuilder.() -> Unit,
 ) {
     contract {
         callsInPlace(block, InvocationKind.EXACTLY_ONCE)
     }
     routing {
-        siteInRoute(baseUrl, block)
+        site(snark, data, baseUrl, siteMeta, block)
     }
 }
diff --git a/snark-ktor/src/main/kotlin/space/kscience/snark/ktor/extractData.kt b/snark-ktor/src/main/kotlin/space/kscience/snark/ktor/extractData.kt
index fc47faf..d3cdb57 100644
--- a/snark-ktor/src/main/kotlin/space/kscience/snark/ktor/extractData.kt
+++ b/snark-ktor/src/main/kotlin/space/kscience/snark/ktor/extractData.kt
@@ -12,30 +12,30 @@ import java.time.LocalDateTime
 import kotlin.io.path.*
 
 
-public fun KtorSiteBuilder.extractResources(uri: URI, targetPath: Path): Path {
-    if (Files.isDirectory(targetPath)) {
-        logger.info { "Using existing data directory at $targetPath." }
-    } else {
-        logger.info { "Copying data from $uri into $targetPath." }
-        targetPath.createDirectories()
-        //Copy everything into a temporary directory
-        FileSystems.newFileSystem(uri, emptyMap<String, Any>()).use { fs ->
-            val rootPath: Path = fs.provider().getPath(uri)
-            Files.walk(rootPath).forEach { source: Path ->
-                if (source.isRegularFile()) {
-                    val relative = source.relativeTo(rootPath).toString()
-                    val destination: Path = targetPath.resolve(relative)
-                    destination.parent.createDirectories()
-                    Files.copy(source, destination)
-                }
-            }
-        }
-    }
-    return targetPath
-}
-
-public fun KtorSiteBuilder.extractResources(resource: String, targetPath: Path): Path =
-    extractResources(javaClass.getResource(resource)!!.toURI(), targetPath)
+//public fun KtorSiteBuilder.extractResources(uri: URI, targetPath: Path): Path {
+//    if (Files.isDirectory(targetPath)) {
+//        logger.info { "Using existing data directory at $targetPath." }
+//    } else {
+//        logger.info { "Copying data from $uri into $targetPath." }
+//        targetPath.createDirectories()
+//        //Copy everything into a temporary directory
+//        FileSystems.newFileSystem(uri, emptyMap<String, Any>()).use { fs ->
+//            val rootPath: Path = fs.provider().getPath(uri)
+//            Files.walk(rootPath).forEach { source: Path ->
+//                if (source.isRegularFile()) {
+//                    val relative = source.relativeTo(rootPath).toString()
+//                    val destination: Path = targetPath.resolve(relative)
+//                    destination.parent.createDirectories()
+//                    Files.copy(source, destination)
+//                }
+//            }
+//        }
+//    }
+//    return targetPath
+//}
+//
+//public fun KtorSiteBuilder.extractResources(resource: String, targetPath: Path): Path =
+//    extractResources(javaClass.getResource(resource)!!.toURI(), targetPath)
 
 private const val DEPLOY_DATE_FILE = "deployDate"
 private const val BUILD_DATE_FILE = "/buildDate"