diff --git a/src/ts/@overflow/commons/application/context/instance_definition_reader.ts b/src/ts/@overflow/commons/application/context/instance_definition_reader.ts
index dba6480..841be84 100644
--- a/src/ts/@overflow/commons/application/context/instance_definition_reader.ts
+++ b/src/ts/@overflow/commons/application/context/instance_definition_reader.ts
@@ -2,23 +2,30 @@ import {
   ClassType,
 } from '@overflow/commons/core/type';
 
+import { Assert } from '@overflow/commons/core/util';
+
 import {
   InstanceDefinitionRegistry, InstanceNameGenerator,
+  InstanceDefinition,
 } from '@overflow/commons/di/factory';
 
+
 export class InstanceDefinitionReader {
   private instanceDefinitionRegistry: InstanceDefinitionRegistry;
   private instanceNameGenerator: InstanceNameGenerator;
 
   public constructor(registry: InstanceDefinitionRegistry) {
-    //
+    Assert.notNull(registry, 'InstanceDefinitionRegistry must not be null');
+    this.instanceDefinitionRegistry = registry;
   }
 
   public register(...injectables: ClassType[]): void {
-    //
+    injectables.forEach(injectable => {
+      this.registerInstance(injectable);
+    });
   }
 
   public registerInstance(injectable: ClassType): void {
-    //
+    let instanceDefinition: InstanceDefinition = new InstanceDefinition(injectable);
   }
 }
diff --git a/src/ts/@overflow/commons/application/context/scope_metadata_resolver.ts b/src/ts/@overflow/commons/application/context/scope_metadata_resolver.ts
new file mode 100644
index 0000000..6be8ab2
--- /dev/null
+++ b/src/ts/@overflow/commons/application/context/scope_metadata_resolver.ts
@@ -0,0 +1,21 @@
+import {
+  Annotation,
+} from '@overflow/commons/core/reflect';
+
+import {
+  ClassType,
+} from '@overflow/commons/core/type';
+
+import { ScopeAnnotation } from '@overflow/commons/di/decorators';
+import { InstanceDefinition } from '@overflow/commons/di/factory';
+import { ScopeType } from '@overflow/commons/di/type';
+
+
+export class ScopeMetadataResolver {
+  protected static scopeAnnotationType: ClassType<Annotation> = ScopeAnnotation;
+
+  public resolveScopeMetadata(definition: InstanceDefinition): ScopeType {
+    let scope: ScopeType = ScopeType.Default;
+
+  }
+}
diff --git a/src/ts/@overflow/commons/di/decorators/index.ts b/src/ts/@overflow/commons/di/decorators/index.ts
index 628fa95..9fb9d18 100644
--- a/src/ts/@overflow/commons/di/decorators/index.ts
+++ b/src/ts/@overflow/commons/di/decorators/index.ts
@@ -1,6 +1,9 @@
 export * from './inject';
 export * from './injectable';
+export * from './named';
 export * from './post_construct';
 export * from './pre_destroy';
+export * from './qualifier';
 export * from './resource';
+export * from './scope';
 export * from './value';
diff --git a/src/ts/@overflow/commons/di/decorators/scope.ts b/src/ts/@overflow/commons/di/decorators/scope.ts
index e69de29..a87ddd1 100644
--- a/src/ts/@overflow/commons/di/decorators/scope.ts
+++ b/src/ts/@overflow/commons/di/decorators/scope.ts
@@ -0,0 +1,46 @@
+import {
+  Annotation,
+  Decorator,
+} from '@overflow/commons/core/reflect';
+
+import {
+  PropertyKeyType,
+  TypeUtil,
+} from '@overflow/commons/core/type';
+
+import {
+  InstanceNameType,
+  ScopeType,
+} from '@overflow/commons/di/type';
+
+export interface ScopeAnnotationAttributes {
+  value?: ScopeType;
+}
+
+export class ScopeAnnotation extends Annotation {
+  public readonly attributes: ScopeAnnotationAttributes = {
+    value: ScopeType.Default,
+  };
+
+  public constructor(value: ScopeType | ScopeAnnotationAttributes) {
+    super();
+
+    if (undefined !== (<ScopeAnnotationAttributes>value).value) {
+      this.copyAttributes(this.attributes, <ScopeAnnotationAttributes>value);
+    } else {
+      this.attributes.value = value;
+    }
+  }
+
+  public classDecorator<TFunction extends Function>(target: TFunction): TFunction | void {
+    console.log('Scope');
+  }
+
+  public methodDecorator<T>(target: Object, propertyKey: PropertyKeyType,
+                            descriptor: TypedPropertyDescriptor<T>): TypedPropertyDescriptor<T> | void {
+    console.log('Scope');
+  }
+
+}
+
+export const Scope = Decorator.create(ScopeAnnotation);
diff --git a/src/ts/@overflow/commons/di/factory/instance_definition.ts b/src/ts/@overflow/commons/di/factory/instance_definition.ts
index 512c5f1..16c8abb 100644
--- a/src/ts/@overflow/commons/di/factory/instance_definition.ts
+++ b/src/ts/@overflow/commons/di/factory/instance_definition.ts
@@ -36,6 +36,11 @@ export class InstanceDefinition {
     return this.attributes.keys();
   }
 
+  // Metadata
+  public getMetadata(): AnnotationMetadata {
+    return undefined;
+  }
+
   public setScope(scope: ScopeType): void {
     this.scope = scope;
   }
diff --git a/src/ts/@overflow/commons/di/factory/instance_name_generator.ts b/src/ts/@overflow/commons/di/factory/instance_name_generator.ts
index c4aca24..1a2632a 100644
--- a/src/ts/@overflow/commons/di/factory/instance_name_generator.ts
+++ b/src/ts/@overflow/commons/di/factory/instance_name_generator.ts
@@ -5,4 +5,9 @@ export class InstanceNameGenerator {
   public generateInstanceName(definition: InstanceDefinition, registry: InstanceDefinitionRegistry): string {
     return undefined;
   }
+
+  protected determineInstanceNameFromAnnotation(definition: InstanceDefinition): string {
+    return undefined;
+  }
 }
+
diff --git a/src/ts/@overflow/commons/di/type/annotation_metadata.ts b/src/ts/@overflow/commons/di/type/annotation_metadata.ts
new file mode 100644
index 0000000..0ffbd4f
--- /dev/null
+++ b/src/ts/@overflow/commons/di/type/annotation_metadata.ts
@@ -0,0 +1,3 @@
+export class AnnotationMetadata {
+
+}