diff --git a/java/src/com/android/inputmethod/latin/makedict/AbstractDictDecoder.java b/java/src/com/android/inputmethod/latin/makedict/AbstractDictDecoder.java
index e7d1c98..1bc3227 100644
--- a/java/src/com/android/inputmethod/latin/makedict/AbstractDictDecoder.java
+++ b/java/src/com/android/inputmethod/latin/makedict/AbstractDictDecoder.java
@@ -20,7 +20,6 @@
 import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.CharEncoding;
 import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.DictBuffer;
 import com.android.inputmethod.latin.makedict.FormatSpec.FormatOptions;
-import com.android.inputmethod.latin.makedict.FusionDictionary.WeightedString;
 
 import java.io.FileNotFoundException;
 import java.io.IOException;
@@ -117,94 +116,6 @@
     }
 
     /**
-     * A utility class for reading a PtNode.
-     */
-    protected static class PtNodeReader {
-        protected static int readPtNodeOptionFlags(final DictBuffer dictBuffer) {
-            return dictBuffer.readUnsignedByte();
-        }
-
-        protected static int readParentAddress(final DictBuffer dictBuffer,
-                final FormatOptions formatOptions) {
-            if (BinaryDictIOUtils.supportsDynamicUpdate(formatOptions)) {
-                return BinaryDictDecoderUtils.readSInt24(dictBuffer);
-            } else {
-                return FormatSpec.NO_PARENT_ADDRESS;
-            }
-        }
-
-        protected static int readChildrenAddress(final DictBuffer dictBuffer, final int optionFlags,
-                final FormatOptions formatOptions) {
-            if (BinaryDictIOUtils.supportsDynamicUpdate(formatOptions)) {
-                final int address = BinaryDictDecoderUtils.readSInt24(dictBuffer);
-                if (address == 0) return FormatSpec.NO_CHILDREN_ADDRESS;
-                return address;
-            } else {
-                switch (optionFlags & FormatSpec.MASK_CHILDREN_ADDRESS_TYPE) {
-                    case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_ONEBYTE:
-                        return dictBuffer.readUnsignedByte();
-                    case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_TWOBYTES:
-                        return dictBuffer.readUnsignedShort();
-                    case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_THREEBYTES:
-                        return dictBuffer.readUnsignedInt24();
-                    case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_NOADDRESS:
-                    default:
-                        return FormatSpec.NO_CHILDREN_ADDRESS;
-                }
-            }
-        }
-
-        // Reads shortcuts and returns the read length.
-        protected static int readShortcut(final DictBuffer dictBuffer,
-                final ArrayList<WeightedString> shortcutTargets) {
-            final int pointerBefore = dictBuffer.position();
-            dictBuffer.readUnsignedShort(); // skip the size
-            while (true) {
-                final int targetFlags = dictBuffer.readUnsignedByte();
-                final String word = CharEncoding.readString(dictBuffer);
-                shortcutTargets.add(new WeightedString(word,
-                        targetFlags & FormatSpec.FLAG_BIGRAM_SHORTCUT_ATTR_FREQUENCY));
-                if (0 == (targetFlags & FormatSpec.FLAG_BIGRAM_SHORTCUT_ATTR_HAS_NEXT)) break;
-            }
-            return dictBuffer.position() - pointerBefore;
-        }
-
-        protected static int readBigramAddresses(final DictBuffer dictBuffer,
-                final ArrayList<PendingAttribute> bigrams, final int baseAddress) {
-            int readLength = 0;
-            int bigramCount = 0;
-            while (bigramCount++ < FormatSpec.MAX_BIGRAMS_IN_A_PTNODE) {
-                final int bigramFlags = dictBuffer.readUnsignedByte();
-                ++readLength;
-                final int sign = 0 == (bigramFlags & FormatSpec.FLAG_BIGRAM_ATTR_OFFSET_NEGATIVE)
-                        ? 1 : -1;
-                int bigramAddress = baseAddress + readLength;
-                switch (bigramFlags & FormatSpec.MASK_BIGRAM_ATTR_ADDRESS_TYPE) {
-                    case FormatSpec.FLAG_BIGRAM_ATTR_ADDRESS_TYPE_ONEBYTE:
-                        bigramAddress += sign * dictBuffer.readUnsignedByte();
-                        readLength += 1;
-                        break;
-                    case FormatSpec.FLAG_BIGRAM_ATTR_ADDRESS_TYPE_TWOBYTES:
-                        bigramAddress += sign * dictBuffer.readUnsignedShort();
-                        readLength += 2;
-                        break;
-                    case FormatSpec.FLAG_BIGRAM_ATTR_ADDRESS_TYPE_THREEBYTES:
-                        bigramAddress += sign * dictBuffer.readUnsignedInt24();
-                        readLength += 3;
-                        break;
-                    default:
-                        throw new RuntimeException("Has bigrams with no address");
-                }
-                bigrams.add(new PendingAttribute(
-                        bigramFlags & FormatSpec.FLAG_BIGRAM_SHORTCUT_ATTR_FREQUENCY,
-                        bigramAddress));
-                if (0 == (bigramFlags & FormatSpec.FLAG_BIGRAM_SHORTCUT_ATTR_HAS_NEXT)) break;
-            }
-            return readLength;
-        }
-    }
-
-    /**
      * Check whether the header contains the expected information. This is a no-error method,
      * that will return an error code and never throw a checked exception.
      * @return an error code, either ERROR_* or SUCCESS.
@@ -264,9 +175,4 @@
     public boolean hasNextPtNodeArray() {
         return false;
     }
-
-    @Override
-    @UsedForTesting
-    public void skipPtNode(final FormatOptions formatOptions) {
-    }
 }
diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderUtils.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderUtils.java
index 247d81a..fc5788d 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderUtils.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictDecoderUtils.java
@@ -166,15 +166,6 @@
             return size;
         }
 
-        @UsedForTesting
-        static int getCharArraySize(final int[] chars, final int start, final int end) {
-            int size = 0;
-            for (int i = start; i < end; ++i) {
-                size += getCharSize(chars[i]);
-            }
-            return size;
-        }
-
         /**
          * Writes a char array to a byte buffer.
          *
@@ -253,41 +244,6 @@
         }
 
         /**
-         * Writes an array of code points with our character format to an OutputStream.
-         *
-         * This will also write the terminator byte.
-         *
-         * @param stream the OutputStream to write to.
-         * @param codePoints the array of code points
-         * @return the size written, in bytes.
-         */
-        // TODO: Merge this method with writeCharArray and rename the various write* methods to
-        // make the difference clear.
-        @UsedForTesting
-        static int writeCodePoints(final OutputStream stream, final int[] codePoints,
-                final int startIndex, final int endIndex)
-                throws IOException {
-            int written = 0;
-            for (int i = startIndex; i < endIndex; ++i) {
-                final int codePoint = codePoints[i];
-                final int charSize = getCharSize(codePoint);
-                if (1 == charSize) {
-                    stream.write((byte) codePoint);
-                } else {
-                    stream.write((byte) (0xFF & (codePoint >> 16)));
-                    stream.write((byte) (0xFF & (codePoint >> 8)));
-                    stream.write((byte) (0xFF & codePoint));
-                }
-                written += charSize;
-            }
-            if (endIndex - startIndex > 1) {
-                stream.write(FormatSpec.PTNODE_CHARACTERS_TERMINATOR);
-                written += FormatSpec.PTNODE_TERMINATOR_SIZE;
-            }
-            return written;
-        }
-
-        /**
          * Reads a string from a DictBuffer. This is the converse of the above method.
          */
         static String readString(final DictBuffer dictBuffer) {
@@ -321,50 +277,6 @@
         }
     }
 
-    // Input methods: Read a binary dictionary to memory.
-    // readDictionaryBinary is the public entry point for them.
-
-    static int readSInt24(final DictBuffer dictBuffer) {
-        final int retval = dictBuffer.readUnsignedInt24();
-        final int sign = ((retval & FormatSpec.MSB24) != 0) ? -1 : 1;
-        return sign * (retval & FormatSpec.SINT24_MAX);
-    }
-
-    static int readChildrenAddress(final DictBuffer dictBuffer,
-            final int optionFlags, final FormatOptions options) {
-        if (options.supportsDynamicUpdate()) {
-            final int address = dictBuffer.readUnsignedInt24();
-            if (address == 0) return FormatSpec.NO_CHILDREN_ADDRESS;
-            if ((address & FormatSpec.MSB24) != 0) {
-                return -(address & FormatSpec.SINT24_MAX);
-            } else {
-                return address;
-            }
-        }
-        switch (optionFlags & FormatSpec.MASK_CHILDREN_ADDRESS_TYPE) {
-            case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_ONEBYTE:
-                return dictBuffer.readUnsignedByte();
-            case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_TWOBYTES:
-                return dictBuffer.readUnsignedShort();
-            case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_THREEBYTES:
-                return dictBuffer.readUnsignedInt24();
-            case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_NOADDRESS:
-            default:
-                return FormatSpec.NO_CHILDREN_ADDRESS;
-        }
-    }
-
-    static int readParentAddress(final DictBuffer dictBuffer,
-            final FormatOptions formatOptions) {
-        if (BinaryDictIOUtils.supportsDynamicUpdate(formatOptions)) {
-            final int parentAddress = dictBuffer.readUnsignedInt24();
-            final int sign = ((parentAddress & FormatSpec.MSB24) != 0) ? -1 : 1;
-            return sign * (parentAddress & FormatSpec.SINT24_MAX);
-        } else {
-            return FormatSpec.NO_PARENT_ADDRESS;
-        }
-    }
-
     /**
      * Reads and returns the PtNode count out of a buffer and forwards the pointer.
      */
diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
index 67f86d4..54446df 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
@@ -21,7 +21,6 @@
 import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.CharEncoding;
 import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.DictBuffer;
 import com.android.inputmethod.latin.makedict.FormatSpec.FormatOptions;
-import com.android.inputmethod.latin.makedict.FusionDictionary.PtNode;
 import com.android.inputmethod.latin.utils.ByteArrayDictBuffer;
 
 import java.io.File;
diff --git a/java/src/com/android/inputmethod/latin/makedict/DictDecoder.java b/java/src/com/android/inputmethod/latin/makedict/DictDecoder.java
index bba1d43..a93a8bb 100644
--- a/java/src/com/android/inputmethod/latin/makedict/DictDecoder.java
+++ b/java/src/com/android/inputmethod/latin/makedict/DictDecoder.java
@@ -228,8 +228,6 @@
         }
     }
 
-    public void skipPtNode(final FormatOptions formatOptions);
-
     /**
      * @return whether this decoder has a valid binary dictionary that it can decode.
      */
diff --git a/java/src/com/android/inputmethod/latin/makedict/Ver2DictDecoder.java b/java/src/com/android/inputmethod/latin/makedict/Ver2DictDecoder.java
index f22b118..fd6138d 100644
--- a/java/src/com/android/inputmethod/latin/makedict/Ver2DictDecoder.java
+++ b/java/src/com/android/inputmethod/latin/makedict/Ver2DictDecoder.java
@@ -20,7 +20,6 @@
 import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.CharEncoding;
 import com.android.inputmethod.latin.makedict.BinaryDictDecoderUtils.DictBuffer;
 import com.android.inputmethod.latin.makedict.FormatSpec.FormatOptions;
-import com.android.inputmethod.latin.makedict.FusionDictionary.PtNode;
 import com.android.inputmethod.latin.makedict.FusionDictionary.WeightedString;
 
 import android.util.Log;
@@ -38,11 +37,82 @@
 public class Ver2DictDecoder extends AbstractDictDecoder {
     private static final String TAG = Ver2DictDecoder.class.getSimpleName();
 
-    protected static class PtNodeReader extends AbstractDictDecoder.PtNodeReader {
+    /**
+     * A utility class for reading a PtNode.
+     */
+    protected static class PtNodeReader {
         private static ProbabilityInfo readProbabilityInfo(final DictBuffer dictBuffer) {
             // Ver2 dicts don't contain historical information.
             return new ProbabilityInfo(dictBuffer.readUnsignedByte());
         }
+
+        protected static int readPtNodeOptionFlags(final DictBuffer dictBuffer) {
+            return dictBuffer.readUnsignedByte();
+        }
+
+        protected static int readChildrenAddress(final DictBuffer dictBuffer,
+                final int ptNodeFlags) {
+            switch (ptNodeFlags & FormatSpec.MASK_CHILDREN_ADDRESS_TYPE) {
+                case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_ONEBYTE:
+                    return dictBuffer.readUnsignedByte();
+                case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_TWOBYTES:
+                    return dictBuffer.readUnsignedShort();
+                case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_THREEBYTES:
+                    return dictBuffer.readUnsignedInt24();
+                case FormatSpec.FLAG_CHILDREN_ADDRESS_TYPE_NOADDRESS:
+                default:
+                    return FormatSpec.NO_CHILDREN_ADDRESS;
+            }
+        }
+
+        // Reads shortcuts and returns the read length.
+        protected static int readShortcut(final DictBuffer dictBuffer,
+                final ArrayList<WeightedString> shortcutTargets) {
+            final int pointerBefore = dictBuffer.position();
+            dictBuffer.readUnsignedShort(); // skip the size
+            while (true) {
+                final int targetFlags = dictBuffer.readUnsignedByte();
+                final String word = CharEncoding.readString(dictBuffer);
+                shortcutTargets.add(new WeightedString(word,
+                        targetFlags & FormatSpec.FLAG_BIGRAM_SHORTCUT_ATTR_FREQUENCY));
+                if (0 == (targetFlags & FormatSpec.FLAG_BIGRAM_SHORTCUT_ATTR_HAS_NEXT)) break;
+            }
+            return dictBuffer.position() - pointerBefore;
+        }
+
+        protected static int readBigramAddresses(final DictBuffer dictBuffer,
+                final ArrayList<PendingAttribute> bigrams, final int baseAddress) {
+            int readLength = 0;
+            int bigramCount = 0;
+            while (bigramCount++ < FormatSpec.MAX_BIGRAMS_IN_A_PTNODE) {
+                final int bigramFlags = dictBuffer.readUnsignedByte();
+                ++readLength;
+                final int sign = 0 == (bigramFlags & FormatSpec.FLAG_BIGRAM_ATTR_OFFSET_NEGATIVE)
+                        ? 1 : -1;
+                int bigramAddress = baseAddress + readLength;
+                switch (bigramFlags & FormatSpec.MASK_BIGRAM_ATTR_ADDRESS_TYPE) {
+                    case FormatSpec.FLAG_BIGRAM_ATTR_ADDRESS_TYPE_ONEBYTE:
+                        bigramAddress += sign * dictBuffer.readUnsignedByte();
+                        readLength += 1;
+                        break;
+                    case FormatSpec.FLAG_BIGRAM_ATTR_ADDRESS_TYPE_TWOBYTES:
+                        bigramAddress += sign * dictBuffer.readUnsignedShort();
+                        readLength += 2;
+                        break;
+                    case FormatSpec.FLAG_BIGRAM_ATTR_ADDRESS_TYPE_THREEBYTES:
+                        bigramAddress += sign * dictBuffer.readUnsignedInt24();
+                        readLength += 3;
+                        break;
+                    default:
+                        throw new RuntimeException("Has bigrams with no address");
+                }
+                bigrams.add(new PendingAttribute(
+                        bigramFlags & FormatSpec.FLAG_BIGRAM_SHORTCUT_ATTR_FREQUENCY,
+                        bigramAddress));
+                if (0 == (bigramFlags & FormatSpec.FLAG_BIGRAM_SHORTCUT_ATTR_HAS_NEXT)) break;
+            }
+            return readLength;
+        }
     }
 
     protected final File mDictionaryBinaryFile;
@@ -96,8 +166,8 @@
         }
         final DictionaryHeader header = super.readHeader(mDictBuffer);
         final int version = header.mFormatOptions.mVersion;
-        if (!(version >= 2 && version <= 3)) {
-          throw new UnsupportedFormatException("File header has a wrong version : " + version);
+        if (version != FormatSpec.VERSION2) {
+            throw new UnsupportedFormatException("File header has a wrong version : " + version);
         }
         return header;
     }
@@ -109,12 +179,6 @@
         int addressPointer = ptNodePos;
         final int flags = PtNodeReader.readPtNodeOptionFlags(mDictBuffer);
         addressPointer += FormatSpec.PTNODE_FLAGS_SIZE;
-
-        final int parentAddress = PtNodeReader.readParentAddress(mDictBuffer, options);
-        if (BinaryDictIOUtils.supportsDynamicUpdate(options)) {
-            addressPointer += FormatSpec.PARENT_ADDRESS_SIZE;
-        }
-
         final int characters[];
         if (0 != (flags & FormatSpec.FLAG_HAS_MULTIPLE_CHARS)) {
             int index = 0;
@@ -141,7 +205,7 @@
         } else {
             probabilityInfo = null;
         }
-        int childrenAddress = PtNodeReader.readChildrenAddress(mDictBuffer, flags, options);
+        int childrenAddress = PtNodeReader.readChildrenAddress(mDictBuffer, flags);
         if (childrenAddress != FormatSpec.NO_CHILDREN_ADDRESS) {
             childrenAddress += addressPointer;
         }
@@ -168,7 +232,7 @@
             bigrams = null;
         }
         return new PtNodeInfo(ptNodePos, addressPointer, flags, characters, probabilityInfo,
-                parentAddress, childrenAddress, shortcutTargets, bigrams);
+                FormatSpec.NO_PARENT_ADDRESS, childrenAddress, shortcutTargets, bigrams);
     }
 
     @Override
@@ -224,42 +288,4 @@
     public boolean hasNextPtNodeArray() {
         return mDictBuffer.position() != FormatSpec.NO_FORWARD_LINK_ADDRESS;
     }
-
-    @Override
-    public void skipPtNode(final FormatOptions formatOptions) {
-        final int flags = PtNodeReader.readPtNodeOptionFlags(mDictBuffer);
-        PtNodeReader.readParentAddress(mDictBuffer, formatOptions);
-        BinaryDictIOUtils.skipString(mDictBuffer,
-                (flags & FormatSpec.FLAG_HAS_MULTIPLE_CHARS) != 0);
-        PtNodeReader.readChildrenAddress(mDictBuffer, flags, formatOptions);
-        if ((flags & FormatSpec.FLAG_IS_TERMINAL) != 0) {
-            PtNodeReader.readProbabilityInfo(mDictBuffer);
-        }
-        if ((flags & FormatSpec.FLAG_HAS_SHORTCUT_TARGETS) != 0) {
-            final int shortcutsSize = mDictBuffer.readUnsignedShort();
-            mDictBuffer.position(mDictBuffer.position() + shortcutsSize
-                    - FormatSpec.PTNODE_SHORTCUT_LIST_SIZE_SIZE);
-        }
-        if ((flags & FormatSpec.FLAG_HAS_BIGRAMS) != 0) {
-            int bigramCount = 0;
-            while (bigramCount++ < FormatSpec.MAX_BIGRAMS_IN_A_PTNODE) {
-                final int bigramFlags = mDictBuffer.readUnsignedByte();
-                switch (bigramFlags & FormatSpec.MASK_BIGRAM_ATTR_ADDRESS_TYPE) {
-                    case FormatSpec.FLAG_BIGRAM_ATTR_ADDRESS_TYPE_ONEBYTE:
-                        mDictBuffer.readUnsignedByte();
-                        break;
-                    case FormatSpec.FLAG_BIGRAM_ATTR_ADDRESS_TYPE_TWOBYTES:
-                        mDictBuffer.readUnsignedShort();
-                        break;
-                    case FormatSpec.FLAG_BIGRAM_ATTR_ADDRESS_TYPE_THREEBYTES:
-                        mDictBuffer.readUnsignedInt24();
-                        break;
-                }
-                if ((bigramFlags & FormatSpec.FLAG_BIGRAM_SHORTCUT_ATTR_HAS_NEXT) == 0) break;
-            }
-            if (bigramCount >= FormatSpec.MAX_BIGRAMS_IN_A_PTNODE) {
-                throw new RuntimeException("Too many bigrams in a PtNode.");
-            }
-        }
-    }
 }
diff --git a/tools/dicttool/src/com/android/inputmethod/latin/dicttool/XmlDictInputOutput.java b/tools/dicttool/src/com/android/inputmethod/latin/dicttool/XmlDictInputOutput.java
index f45615c..2ac842a 100644
--- a/tools/dicttool/src/com/android/inputmethod/latin/dicttool/XmlDictInputOutput.java
+++ b/tools/dicttool/src/com/android/inputmethod/latin/dicttool/XmlDictInputOutput.java
@@ -358,7 +358,6 @@
         }
         // TODO: use an XMLSerializer if this gets big
         destination.write("<wordlist format=\"2\"");
-        final HashMap<String, String> options = dict.mOptions.mAttributes;
         for (final String key : dict.mOptions.mAttributes.keySet()) {
             final String value = dict.mOptions.mAttributes.get(key);
             destination.write(" " + key + "=\"" + value + "\"");