diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 000000000..7b016a89f
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "java.compile.nullAnalysis.mode": "automatic"
+}
\ No newline at end of file
diff --git a/CHANGES.md b/CHANGES.md
new file mode 100644
index 000000000..c05218e61
--- /dev/null
+++ b/CHANGES.md
@@ -0,0 +1,138 @@
+Here's how you can proceed with the Wrangler enhancement: 
+   
+
+   Step 1: Fork the Repository 
+   Step 2: Modify the Grammar.......//  Modify the parser rules to accept these tokens.
+   Step 3: Update the API (wrangler-api)......//Update the Token Types to support these new types.
+
+
+
+  Changes that i have done :
+Define Byte as a BYTE_SIZE,and Time as TIMEDURATION classes.
+
+THEN I FIX IT IN THE WRABGLER CORE FOLDER \\Directives.g4
+
+Extend the base Token class correctly (from io.cdap.wrangler.api.parser.Token).
+ // Add lexer rules for BYTE_SIZE and TIME_DURATION
+BYTE : [0-9]+ ('KB'|'MB'|'GB'|'B');
+TIME_DURATION : [0-9]+ ('ms'|'s'|'m'|'h'|'d');
+
+// parser rules
+byteSizeArg : BYTE;
+timeDurationArg : TIME;
+
+package io.cdap.wrangler.api.parser;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonPrimitive;
+
+public class Byte implements Token {
+    private final long bytes;
+
+    public Byte(String value) {
+        this.bytes = parseByteSize(value.trim().toUpperCase());
+    }
+
+    private long parseByteSize(String value) {
+        if (value.endsWith("KB")) {
+            return (long)(Double.parseDouble(value.replace("KB", "")) * 1024);
+        } else if (value.endsWith("MB")) {
+            return (long)(Double.parseDouble(value.replace("MB", "")) * 1024 * 1024);
+        } else if (value.endsWith("GB")) {
+            return (long)(Double.parseDouble(value.replace("GB", "")) * 1024 * 1024 * 1024);
+        } else if (value.endsWith("B")) {
+            return Long.parseLong(value.replace("B", ""));
+        } else {
+            throw new IllegalArgumentException("Invalid byte size format: " + value);
+        }
+    }
+
+    public long getBytes() {
+        return bytes;
+    }
+
+    @Override
+    public Object value() {
+        return bytes;
+    }
+
+    @Override
+    public TokenType type() {
+        return TokenType.BYTE;
+    }
+
+    @Override
+    public JsonElement toJson() {
+        return new JsonPrimitive(bytes);
+    }
+}
+
+........
+
+package io.cdap.wrangler.api.parser;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonPrimitive;
+
+public class Time implements Token {
+    private final long nanoseconds;
+
+    public Time (String value) {
+        this.nanoseconds = parseTimeDuration(value.trim().toLowerCase());
+    }
+
+    private long parseTimeDuration(String value) {
+        if (value.endsWith("ns")) {
+            return Long.parseLong(value.replace("ns", ""));
+        } else if (value.endsWith("ms")) {
+            return (long)(Double.parseDouble(value.replace("ms", "")) * 1_000_000);
+        } else if (value.endsWith("s")) {
+            return (long)(Double.parseDouble(value.replace("s", "")) * 1_000_000_000);
+        } else if (value.endsWith("m")) {
+            return (long)(Double.parseDouble(value.replace("m", "")) * 60 * 1_000_000_000L);
+        } else if (value.endsWith("h")) {
+            return (long)(Double.parseDouble(value.replace("h", "")) * 3600 * 1_000_000_000L);
+        } else {
+            throw new IllegalArgumentException("Invalid time duration format: " + value);
+        }
+    }
+
+    public long getNanoseconds() {
+        return nanoseconds;
+    }
+
+    @Override
+    public Object value() {
+        return nanoseconds;
+    }
+
+    @Override
+    public TokenType type() {
+        return TokenType.TIME;
+    }
+
+    @Override
+    public JsonElement toJson() {
+        return new JsonPrimitive(nanoseconds);
+    }
+}
+
+........
+
+
+package io.cdap.wrangler.api.parser;
+
+public enum Tokenn {
+    BYTE,
+    TIME;
+}
+
+//BYTE_SIZE
+//TIME_DURATION
+
+.......
+  IDENTIFIER, BYTE, TIME
+
+
+  ....
+  
diff --git a/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/Byte.java b/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/Byte.java
new file mode 100644
index 000000000..ab25db641
--- /dev/null
+++ b/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/Byte.java
@@ -0,0 +1,45 @@
+package io.cdap.wrangler.api.parser;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonPrimitive;
+
+public class Byte implements Token {
+    private final long bytes;
+
+    public Byte(String value) {
+        this.bytes = parseByteSize(value.trim().toUpperCase());
+    }
+
+    private long parseByteSize(String value) {
+        if (value.endsWith("KB")) {
+            return (long)(Double.parseDouble(value.replace("KB", "")) * 1024);
+        } else if (value.endsWith("MB")) {
+            return (long)(Double.parseDouble(value.replace("MB", "")) * 1024 * 1024);
+        } else if (value.endsWith("GB")) {
+            return (long)(Double.parseDouble(value.replace("GB", "")) * 1024 * 1024 * 1024);
+        } else if (value.endsWith("B")) {
+            return Long.parseLong(value.replace("B", ""));
+        } else {
+            throw new IllegalArgumentException("Invalid byte size format: " + value);
+        }
+    }
+
+    public long getBytes() {
+        return bytes;
+    }
+
+    @Override
+    public Object value() {
+        return bytes;
+    }
+
+    @Override
+    public TokenType type() {
+        return TokenType.BYTE;
+    }
+
+    @Override
+    public JsonElement toJson() {
+        return new JsonPrimitive(bytes);
+    }
+}
diff --git a/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/Time.java b/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/Time.java
new file mode 100644
index 000000000..53bfee66f
--- /dev/null
+++ b/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/Time.java
@@ -0,0 +1,48 @@
+package io.cdap.wrangler.api.parser;
+
+import com.google.gson.JsonElement;
+import com.google.gson.JsonPrimitive;
+
+public class Time implements Token {
+    private final long nanoseconds;
+
+    public Time (String value) {
+        this.nanoseconds = parseTimeDuration(value.trim().toLowerCase());
+    }
+
+    private long parseTimeDuration(String value) {
+        if (value.endsWith("ns")) {
+            return Long.parseLong(value.replace("ns", ""));
+        } else if (value.endsWith("ms")) {
+            return (long)(Double.parseDouble(value.replace("ms", "")) * 1_000_000);
+        } else if (value.endsWith("s")) {
+            return (long)(Double.parseDouble(value.replace("s", "")) * 1_000_000_000);
+        } else if (value.endsWith("m")) {
+            return (long)(Double.parseDouble(value.replace("m", "")) * 60 * 1_000_000_000L);
+        } else if (value.endsWith("h")) {
+            return (long)(Double.parseDouble(value.replace("h", "")) * 3600 * 1_000_000_000L);
+        } else {
+            throw new IllegalArgumentException("Invalid time duration format: " + value);
+        }
+    }
+
+    public long getNanoseconds() {
+        return nanoseconds;
+    }
+
+    @Override
+    public Object value() {
+        return nanoseconds;
+    }
+
+    @Override
+    public TokenType type() {
+        return TokenType.TIME;
+    }
+
+    @Override
+    public JsonElement toJson() {
+        return new JsonPrimitive(nanoseconds);
+    }
+}
+
diff --git a/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/TokenType.java b/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/TokenType.java
index 8c93b0e6a..8827c2c08 100644
--- a/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/TokenType.java
+++ b/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/TokenType.java
@@ -152,5 +152,5 @@ public enum TokenType implements Serializable {
    * Represents the enumerated type for the object of type {@code String} with restrictions
    * on characters that can be present in a string.
    */
-  IDENTIFIER
+  IDENTIFIER, BYTE, TIME
 }
diff --git a/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/Tokenn.java b/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/Tokenn.java
new file mode 100644
index 000000000..b588c6ffb
--- /dev/null
+++ b/wrangler-api/src/main/java/io/cdap/wrangler/api/parser/Tokenn.java
@@ -0,0 +1,9 @@
+package io.cdap.wrangler.api.parser;
+
+public enum Tokenn {
+    BYTE,
+    TIME;
+}
+
+//BYTE_SIZE
+//TIME_DURATION
\ No newline at end of file
diff --git a/wrangler-core/src/main/antlr4/io/cdap/wrangler/parser/Directives.g4 b/wrangler-core/src/main/antlr4/io/cdap/wrangler/parser/Directives.g4
index 7c517ed6a..c80f59d2f 100644
--- a/wrangler-core/src/main/antlr4/io/cdap/wrangler/parser/Directives.g4
+++ b/wrangler-core/src/main/antlr4/io/cdap/wrangler/parser/Directives.g4
@@ -14,6 +14,9 @@
  * the License.
  */
 
+
+
+
 grammar Directives;
 
 options {
@@ -311,3 +314,12 @@ fragment Int
 fragment Digit
  : [0-9]
  ;
+
+
+ // Add lexer rules for BYTE_SIZE and TIME_DURATION
+BYTE : [0-9]+ ('KB'|'MB'|'GB'|'B');
+TIME_DURATION : [0-9]+ ('ms'|'s'|'m'|'h'|'d');
+
+// parser rules
+byteSizeArg : BYTE;
+timeDurationArg : TIME;