diff --git a/annotation/component.go b/annotation/component.go
new file mode 100644
index 0000000..f7fde6b
--- /dev/null
+++ b/annotation/component.go
@@ -0,0 +1,6 @@
+package annotation
+
+type Component struct {
+	Names *[]string
+	Scope *ScopeType
+}
diff --git a/annotation/inject.go b/annotation/inject.go
new file mode 100644
index 0000000..730b3d8
--- /dev/null
+++ b/annotation/inject.go
@@ -0,0 +1,6 @@
+package annotation
+
+type Inject struct {
+	Name     *string
+	Required *bool
+}
diff --git a/annotation/scope.go b/annotation/scope.go
new file mode 100644
index 0000000..dd6dee2
--- /dev/null
+++ b/annotation/scope.go
@@ -0,0 +1,8 @@
+package annotation
+
+type ScopeType int
+
+const (
+	ScopeTypeSingleton ScopeType = iota
+	ScopeTypeTransiant
+)
diff --git a/glide.yaml b/glide.yaml
new file mode 100644
index 0000000..ca1272a
--- /dev/null
+++ b/glide.yaml
@@ -0,0 +1,2 @@
+package: git.loafle.net/commons_go/di
+import: []
diff --git a/registry/definition.go b/registry/definition.go
new file mode 100644
index 0000000..afe057a
--- /dev/null
+++ b/registry/definition.go
@@ -0,0 +1,28 @@
+package registry
+
+import "reflect"
+
+type typeDefinition struct {
+	pkgName    string
+	typeName   string
+	targetType reflect.Type
+	realType   reflect.Type
+
+	fields map[string]
+}
+
+type fieldDefinition struct {
+	pkgName    string
+	typeName   string
+	targetType reflect.Type
+	realType   reflect.Type
+	
+}
+
+type Service struct {
+	DAO *DAO `di-annotation:""`
+}
+
+type DAO struct {
+
+}
\ No newline at end of file
diff --git a/registry/registry.go b/registry/registry.go
index f1f7321..179cc66 100644
--- a/registry/registry.go
+++ b/registry/registry.go
@@ -1,6 +1,11 @@
 package registry
 
-import "reflect"
+import (
+	"fmt"
+	"reflect"
+
+	cdur "git.loafle.net/commons_go/di/util/reflect"
+)
 
 type ComponentRegistry interface {
 	RegisterType(t reflect.Type, name string) error
@@ -9,3 +14,36 @@ type ComponentRegistry interface {
 	GetInstance(t reflect.Type) (interface{}, error)
 	GetInstanceByName(name string) (interface{}, error)
 }
+
+type defaultComponentRegistry struct {
+	definitions map[string]reflect.Type
+}
+
+func (cr *defaultComponentRegistry) RegisterType(t reflect.Type, name string) error {
+	if nil == t {
+		return fmt.Errorf("DI: t[reflect.Type] is nil")
+	}
+	if !cdur.IsTypeKind(t, reflect.Struct, true) {
+		return fmt.Errorf("DI: t[reflect.Type] must be specified but is %v", t)
+	}
+
+	rt, pkgName, tName := cdur.GetTypeName(t, true)
+	cr.definitions[name] = rt
+
+	return nil
+}
+
+func (cr *defaultComponentRegistry) RegisterFactory(i interface{}) error {
+
+	return nil
+}
+
+func (cr *defaultComponentRegistry) GetInstance(t reflect.Type) (interface{}, error) {
+
+	return nil, nil
+}
+
+func (cr *defaultComponentRegistry) GetInstanceByName(name string) (interface{}, error) {
+
+	return nil, nil
+}
diff --git a/util/reflect/type.go b/util/reflect/type.go
new file mode 100644
index 0000000..c9fa3f6
--- /dev/null
+++ b/util/reflect/type.go
@@ -0,0 +1,23 @@
+package reflect
+
+import (
+	"reflect"
+)
+
+func IsTypeKind(t reflect.Type, kind reflect.Kind, removePtr bool) bool {
+	if reflect.Ptr == t.Kind() {
+		if removePtr {
+			return IsTypeKind(t.Elem(), kind, removePtr)
+		}
+	}
+
+	return kind == t.Kind()
+}
+
+func GetTypeName(t reflect.Type) (realType reflect.Type, pkgName string, name string) {
+	if reflect.Ptr == t.Kind() {
+		return GetTypeName(t.Elem())
+	}
+
+	return t, t.PkgPath(), t.Name()
+}