diff --git a/src/de/inetsoftware/jwebassembly/binary/StructType.java b/src/de/inetsoftware/jwebassembly/binary/StructType.java
new file mode 100644
index 0000000..02cb91c
--- /dev/null
+++ b/src/de/inetsoftware/jwebassembly/binary/StructType.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2019 Volker Berlin (i-net software)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package de.inetsoftware.jwebassembly.binary;
+
+import java.io.IOException;
+import java.util.List;
+
+import de.inetsoftware.jwebassembly.wasm.NamedStorageType;
+import de.inetsoftware.jwebassembly.wasm.ValueType;
+
+/**
+ * An struct type entry in the type section of the WebAssembly.
+ * 
+ * @author Volker Berlin
+ */
+class StructType extends TypeEntry {
+
+    private final List<NamedStorageType> fields;
+
+    /**
+     * Create a new instance.
+     * 
+     * @param fields
+     *            the fields of the struct
+     */
+    StructType( List<NamedStorageType> fields ) {
+        this.fields = fields;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    ValueType getTypeForm() {
+        return ValueType.struct;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    void writeSectionEntryDetails( WasmOutputStream stream ) throws IOException {
+        stream.writeVaruint32( this.fields.size() );
+        for( NamedStorageType field : this.fields ) {
+            stream.writeVarint( 0 );
+            stream.writeValueType( field.type );
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public int hashCode() {
+        return fields.hashCode();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public boolean equals( Object obj ) {
+        if( obj == this ) {
+            return true;
+        }
+        if( obj == null || obj.getClass() != getClass() ) {
+            return false;
+        }
+        StructType type = (StructType)obj;
+        return fields.equals( type.fields );
+    }
+}
diff --git a/src/de/inetsoftware/jwebassembly/binary/TypeEntry.java b/src/de/inetsoftware/jwebassembly/binary/TypeEntry.java
new file mode 100644
index 0000000..7557407
--- /dev/null
+++ b/src/de/inetsoftware/jwebassembly/binary/TypeEntry.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2019 Volker Berlin (i-net software)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package de.inetsoftware.jwebassembly.binary;
+
+import java.io.IOException;
+
+import de.inetsoftware.jwebassembly.wasm.ValueType;
+
+/**
+ * An entry in the type section of the WebAssembly.
+ * 
+ * @author Volker Berlin
+ */
+abstract class TypeEntry extends SectionEntry {
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    final void writeSectionEntry( WasmOutputStream stream ) throws IOException {
+        stream.writeValueType( ValueType.func );
+        writeSectionEntryDetails( stream );
+    }
+
+    /**
+     * Get the form of the type.
+     * @return the form
+     */
+    abstract ValueType getTypeForm();
+
+    /**
+     * Write this single entry to a section
+     * 
+     * @param stream
+     *            the target
+     * @throws IOException
+     *             if any I/O error occur
+     */
+    abstract void writeSectionEntryDetails( WasmOutputStream stream ) throws IOException;
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public abstract int hashCode();
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public abstract boolean equals( Object obj );
+}
diff --git a/src/de/inetsoftware/jwebassembly/wasm/NamedStorageType.java b/src/de/inetsoftware/jwebassembly/wasm/NamedStorageType.java
new file mode 100644
index 0000000..8c79274
--- /dev/null
+++ b/src/de/inetsoftware/jwebassembly/wasm/NamedStorageType.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2019 Volker Berlin (i-net software)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package de.inetsoftware.jwebassembly.wasm;
+
+/**
+ * A ValueType with a name for debug information.
+ * 
+ * @author Volker Berlin
+ */
+public class NamedStorageType {
+
+    public final StorageType type;
+
+    public final String    name;
+
+    /**
+     * Create a new instance
+     * @param type the type
+     * @param name the name
+     */
+    public NamedStorageType( StorageType type, String name ) {
+        this.type = type;
+        this.name = name;
+    }
+}