diff --git a/README.md b/README.md
index 060b3a8..fc7fcfc 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,239 @@
-# core
+# Sharkitek Core
 
-Sharkitek core models library.
\ No newline at end of file
+## Introduction
+
+Sharkitek is a Javascript / TypeScript library designed to ease development of client-side models.
+
+With Sharkitek, you define the architecture of your models by applying decorators (which define their type) on your class properties.
+Then, you can use the defined methods like `serialize`, `deserialize` or `serializeDiff`.
+
+Sharkitek makes use of decorators as defined in the [TypeScript Reference](https://www.typescriptlang.org/docs/handbook/decorators.html).
+Due to the way decorators work, you must always set a value to your properties when you declare them, even if this value is `undefined`.
+
+```typescript
+class Example extends Model
+{
+	@Property(SNumeric)
+	@Identifier
+	id: number = undefined;
+	
+	@Property(SString)
+	name: string = undefined;
+}
+```
+
+## Examples
+
+### Simple model definition
+
+```typescript
+/**
+ * A person.
+ */
+class Person extends Model
+{
+	@Property(SNumeric)
+	@Identifier
+	id: number = undefined;
+	
+	@Property(SString)
+	name: string = undefined;
+
+	@Property(SString)
+	firstName: string = undefined;
+
+	@Property(SString)
+	email: string = undefined;
+}
+```
+
+**Important**: You _must_ set a value to all your defined properties. If there is no set value, the decorator will not
+be applied instantly on object initialization and the deserialization will not work properly.
+
+```typescript
+/**
+ * An article.
+ */
+class Article extends Model
+{
+	@Property(SNumeric)
+	@Identifier
+	id: number = undefined;
+
+	@Property(SString)
+	title: string = undefined;
+
+	@Property(SArray(SModel(Author)))
+	authors: Author[] = [];
+
+	@Property(SString)
+	text: string = undefined;
+
+	@Property(SDecimal)
+	evaluation: number = undefined;
+}
+```
+
+## API
+
+### Types
+
+Types are defined by a class extending `Type`.
+
+Sharkitek defines some basic types by default, in these classes:
+
+- `StringType`: string in the model, string in the serialized object.
+- `NumericType`: number in the model, number in the serialized object.
+- `DecimalType`: number in the model, formatted string in the serialized object.
+- `ArrayType`: array in the model, array in the serialized object.
+- `ModelType`: instance of a specific class in the model, object in the serialized object.
+
+When you are defining a Sharkitek property, you must provide its type by instantiating one of these classes.
+
+```typescript
+class Example extends Model
+{
+	@Property(new StringType())
+	foo: string = undefined;
+}
+```
+
+To ease the use of these classes and reduce read complexity, some constant variables and functions are defined in the library,
+following a certain naming convention: "S{type_name}".
+
+- `StringType` => `SString`
+- `NumericType` => `SNumeric`
+- `DecimalType` => `SDecimal`
+- `ArrayType` => `SArray`
+- `ModelType` => `SModel`
+
+When the types require parameters, the constant is defined as a function. If there is no parameter, then a simple
+variable is enough.
+
+Type implementers should provide a corresponding variable or function for each defined type. They can even provide
+multiple functions or constants when predefined parameters. (For example, we could define `SStringArray` which would
+be a variable similar to `SArray(SString)`.)
+
+```typescript
+class Example extends Model
+{
+	@Property(SString)
+	foo: string = undefined;
+}
+```
+
+### Models
+
+#### `serialize()`
+
+Serialize the model.
+
+Example:
+
+```typescript
+const serializedObject = model.serialize();
+```
+
+#### `deserialize(serializedObject)`
+
+Deserialize the model.
+
+Example:
+
+```typescript
+const model = (new TestModel()).deserialize({
+	id: 5,
+	title: "Hello World!",
+	users: [
+		{
+			id: 6,
+			name: "TEST",
+		},
+	],
+});
+```
+
+#### `serializeDiff()`
+
+Serialize the difference between current model state and original one.
+
+Example:
+
+```typescript
+const model = (new TestModel()).deserialize({
+	id: 5,
+	title: "Hello World!",
+	users: [
+		{
+			id: 6,
+			name: "TEST",
+		},
+	],
+});
+
+model.title = "A new title for a new world";
+
+const result = model.serializeDiff();
+// if `id` is defined as the model identifier:
+// result = { id: 5, title: "A new title for a new world" }
+// if `id` is not defined as the model identifier:
+// result = { title: "A new title for a new world" }
+
+```
+
+#### `resetDiff()`
+
+Set current properties values as original values.
+
+Example:
+
+```typescript
+const model = (new TestModel()).deserialize({
+	id: 5,
+	title: "Hello World!",
+	users: [
+		{
+			id: 6,
+			name: "TEST",
+		},
+	],
+});
+
+model.title = "A new title for a new world";
+
+model.resetDiff();
+
+const result = model.serializeDiff();
+// if `id` is defined as the model identifier:
+// result = { id: 5 }
+// if `id` is not defined as the model identifier:
+// result = {}
+
+```
+
+#### `save()`
+
+Get difference between original values and current ones, then reset it.
+Similar to call `serializeDiff()` then `resetDiff()`.
+
+```typescript
+const model = (new TestModel()).deserialize({
+	id: 5,
+	title: "Hello World!",
+	users: [
+		{
+			id: 6,
+			name: "TEST",
+		},
+	],
+});
+
+model.title = "A new title for a new world";
+
+const result = model.save();
+// if `id` is defined as the model identifier:
+// result = { id: 5, title: "A new title for a new world" }
+// if `id` is not defined as the model identifier:
+// result = { title: "A new title for a new world" }
+
+```
diff --git a/src/Model/Model.ts b/src/Model/Model.ts
index d7caf3d..d6f91cc 100644
--- a/src/Model/Model.ts
+++ b/src/Model/Model.ts
@@ -23,6 +23,19 @@ interface SharkitekMetadataInterface
 	type: Type<any, any>;
 }
 
+/**
+ * Class decorator for Sharkitek models.
+ */
+export function Sharkitek(constructor: Function)
+{
+	/*return class extends (constructor as FunctionConstructor) {
+		constructor()
+		{
+			super();
+		}
+	};*/
+}
+
 /**
  * Property decorator to define a Sharkitek model identifier.
  */