diff --git a/README.md b/README.md
index 1c2eed9..0ab50fb 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,9 @@
 # casser
 Yet Another Cassandra Client
+
+### Requirements
+
+* Only JVM 8
+* Datastax Driver
+* Maven
+
diff --git a/src/casser/Example.java b/src/casser/Example.java
index e6926f5..7f89a78 100644
--- a/src/casser/Example.java
+++ b/src/casser/Example.java
@@ -6,9 +6,9 @@ import casser.tuple.Tuple2;
 
 public class Example {
 
-	User userDsl = Casser.dsl(User.class);
+	static final User _user = Casser.dsl(User.class);
 	
-	Session session = Casser.connect("localhost").update(userDsl).get();
+	Session session = Casser.connect("localhost").update(_user).get();
 	
 	public static User mapUser(Tuple2<String, Integer> t) {
 		User user = Casser.pojo(User.class);
@@ -25,15 +25,15 @@ public class Example {
 		newUser.setAge(34);
 		session.upsert(newUser);
 		
-		String nameAndAge = session.select(userDsl::getName, userDsl::getAge).where(userDsl::getId,  100L).sync().findFirst().map(t -> {
+		String nameAndAge = session.select(_user::getName, _user::getAge).where(_user::getId, "==", 100L).sync().findFirst().map(t -> {
 			return t.v1 + ":" +  t.v2;
 		}).get();
 
-		User user = session.select(userDsl::getName, userDsl::getAge).where(userDsl::getId,  100L).map(Example::mapUser).sync().findFirst().get();
+		User user = session.select(_user::getName, _user::getAge).where(_user::getId, "==", 100L).map(Example::mapUser).sync().findFirst().get();
 
-		session.update(userDsl::setAge, 10).where(userDsl::getId, 100L).async();
+		session.update(_user::setAge, 10).where(_user::getId, "==", 100L).async();
 		
-		session.delete().where(userDsl::getId, 100L).async();
+		session.delete().where(_user::getId, "==", 100L).async();
 		
 	}
 	
diff --git a/src/casser/core/SupportedOperators.java b/src/casser/core/SupportedOperators.java
new file mode 100644
index 0000000..f7eb005
--- /dev/null
+++ b/src/casser/core/SupportedOperators.java
@@ -0,0 +1,20 @@
+package casser.core;
+
+public final class SupportedOperators {
+
+	public static final String EQUAL = "==";
+	
+	public static final String NOT_EQUAL = "!=";
+
+	public static final String GREATER = ">";
+
+	public static final String LESS = "<";
+
+	public static final String GREATER_OR_EQUAL = ">=";
+
+	public static final String LESS_OR_EQUAL = "<=";
+	
+	private SupportedOperators() {
+	}
+	
+}
diff --git a/src/casser/operation/DeleteOperation.java b/src/casser/operation/DeleteOperation.java
index d702622..9e30de7 100644
--- a/src/casser/operation/DeleteOperation.java
+++ b/src/casser/operation/DeleteOperation.java
@@ -4,7 +4,12 @@ import casser.dsl.Getter;
 
 public class DeleteOperation extends AbstractOperation<Object> {
 
-	public <V> DeleteOperation where(Getter<V> getter, V val) {
+	public <V> DeleteOperation where(Getter<V> getter, String operator, V val) {
 		return this;
 	}
+	
+	public <V> DeleteOperation and(Getter<V> getter, String operator, V val) {
+		return this;
+	}
+	
 }
diff --git a/src/casser/operation/SelectOperation.java b/src/casser/operation/SelectOperation.java
index 926995f..5233e9c 100644
--- a/src/casser/operation/SelectOperation.java
+++ b/src/casser/operation/SelectOperation.java
@@ -7,10 +7,14 @@ import casser.dsl.Getter;
 
 public class SelectOperation<E> extends AbstractStreamOperation<E> {
 
-	public <V> SelectOperation<E> where(Getter<V> getter, V val) {
+	public <V> SelectOperation<E> where(Getter<V> getter, String operator, V val) {
 		return this;
 	}
-	
+
+	public <V> SelectOperation<E> and(Getter<V> getter, String operator, V val) {
+		return this;
+	}
+
 	public <R> SelectOperation<R> map(Function<E, R> fn) {
 		return null;
 	}
diff --git a/src/casser/operation/UpdateOperation.java b/src/casser/operation/UpdateOperation.java
index 3107987..b81d092 100644
--- a/src/casser/operation/UpdateOperation.java
+++ b/src/casser/operation/UpdateOperation.java
@@ -4,9 +4,12 @@ import casser.dsl.Getter;
 
 public class UpdateOperation extends AbstractOperation<Object> {
 
-	public <V> UpdateOperation where(Getter<V> getter, V val) {
+	public <V> UpdateOperation where(Getter<V> getter, String operator, V val) {
 		return this;
 	}
 
+	public <V> UpdateOperation and(Getter<V> getter, String operator, V val) {
+		return this;
+	}
 	
 }