diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2a94754
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+out/*
\ No newline at end of file
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..9c49fc7
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,26 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch test function",
+            "type": "go",
+            "request": "launch",
+            "mode": "test",
+            "program": "${workspaceFolder}",
+            "args": [
+                "-test.run",
+                "TestMongoInit"
+            ]
+        },
+        {
+            "name": "Launch Package",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${fileDirname}"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/conf.go b/conf.go
new file mode 100644
index 0000000..b2cc5e4
--- /dev/null
+++ b/conf.go
@@ -0,0 +1,26 @@
+package oclib
+
+import "sync"
+
+// ===================================================
+//	This class has to be updated everytime
+//	a new configuration variable is defined
+//	in a componant that imports oc-lib
+// ===================================================
+
+type Config struct {
+	MongoURL string
+	DCNAME string
+	DBPOINT string
+
+}
+
+var instance *Config
+var once sync.Once
+
+func GetConfig() *Config {
+	once.Do(func() {
+		instance = &Config{}
+	})
+	return instance
+}
diff --git a/data.go b/data.go
index ad54c3d..92941ef 100644
--- a/data.go
+++ b/data.go
@@ -1,5 +1,16 @@
 package oclib
 
 type Data struct {
-	Resource
+	AbstractResource
+
+	Protocols		[]string	`json:"protocol"` //TODO Enum type
+	DataType    	string   `json:"datatype"`
+	Example  		string   `json:"example" required:"true" validate:"required" description:"base64 encoded data"`
+
 }
+
+
+func (d *Data) GetType() ResourceType{
+	return DATA
+}
+
diff --git a/data_test.go b/data_test.go
new file mode 100644
index 0000000..163d7dc
--- /dev/null
+++ b/data_test.go
@@ -0,0 +1,9 @@
+package oclib
+
+import (
+	"testing"
+)
+
+func TestPostOneData(t *testing.T){
+	
+}
\ No newline at end of file
diff --git a/datacenter.go b/datacenter.go
index 692632c..a0dec2b 100644
--- a/datacenter.go
+++ b/datacenter.go
@@ -1 +1,39 @@
 package oclib
+
+type Datacenter struct {
+	Resource
+	ID			string	`json:"ID", required: "true"`
+	Name		string	`json:"Name", required: "true" `
+
+	Owner        string `json:"owner" `
+	BookingPrice int    `json:"bookingPrice" `
+
+	CPU DatacenterCpuModel    `json:"cpu" required:"true"`
+	RAM DatacenterMemoryModel `json:"ram" required:"true"`
+	GPU []DatacenterGpuModel  `json:"gpu" required:"true"`
+}
+
+type DatacenterCpuModel struct {
+	Cores         uint   `json:"cores" required:"true"` //TODO: validate
+	Architecture  string `json:"architecture"`          //TOOD: enum
+	Shared        bool   `json:"shared"`
+	MinimumMemory uint   `json:"minimum_memory"`
+	Platform      string `json:"platform"`
+}
+
+type DatacenterMemoryModel struct {
+	Size uint `json:"size" description:"Units in MB"`
+	Ecc  bool `json:"ecc"`
+}
+
+type DatacenterGpuModel struct {
+	CudaCores   uint   `json:"cuda_cores"`
+	Model       string `json:"model"`
+	Memory      uint   `json:"memory" description:"Units in MB"`
+	TensorCores uint   `json:"tensor_cores"`
+}
+
+
+func (d *Datacenter) GetType() ResourceType{
+	return DATACENTER
+}
\ No newline at end of file
diff --git a/doc/model.puml b/doc/model.puml
index f73439e..a7bd83b 100644
--- a/doc/model.puml
+++ b/doc/model.puml
@@ -2,7 +2,7 @@
 
 
 abstract Ressource {
-    +id: int
+    +UUID: int
     +name: string
     +icon: string
     +description: string
@@ -11,12 +11,12 @@ abstract Ressource {
 }
 
 class Data {
-    +id: int
+    +UUID: int
     +name: string
 }
 
 class Processing {
-    +id: int
+    +UUID: int
     +name: string
     +container: string
     +command: int
@@ -25,83 +25,83 @@ class Processing {
 }
 
 class Storage {
-    +id: int
+    +UUID: int
     +name: string
     +url: string
     +capacity: int
 }
 
 class Datacenter {
-    +id: int
+    +UUID: int
     +name: string
 
 }
 
 class Workflow {
-    +id: int
+    +UUID: int
     +name: string
 }
 
 class ResourceSet {
-    +id: int
+    +UUID: int
     +name: string
     +ressources: Ressource[]
 }
 
 class WorkflowSchedule {
-    +id: int
+    +UUID: int
     +start: date
     +end: date
     +cron : string
 }
 
 class Graph {
-    +id: int
-    +ressources: map[GraphicElement.ID]Ressource 
+    +UUID: int
+    +ressources: map[GraphicElement.UUID]Ressource 
     +links: Link[] 
 }
 
 class Link {
-    +id: int
-    +source: GraphicElement.ID
-    +target: GraphicElement.ID
+    +UUID: int
+    +source: GraphicElement.UUID
+    +target: GraphicElement.UUID
     +graphic: GraphicLink
 }
 
 class GraphicLink {
-    +id: int
+    +UUID: int
     +startXY: coord
     +endXY: coord
     +style: string
 }   
 
 class GraphicElement {
-    +id: int
+    +UUID: int
     +style: string
     +xy: coord
 }
 
 class Calendar {
-    +id: int
+    +UUID: int
     +name: string
     +workflows: Workflow[]
     +owner: string
 }  
 
 class UserWorkflows {
-    +id: int
+    +UUID: int
     +user: string
     +workflows: Workflow[]
 }   
 
 class DatacenterWorkflows {
-    +id: int
+    +UUID: int
     +datacenter: Datacenter
     +workflows: Workflow[]
 }   
 
 class Graph {
-    +id: int
+    +UUID: int
     +graph: Graph
     +workflows: Workflow[]
 }
@@ -121,7 +121,7 @@ Ressource <|-- Workflow
 ResourceSet "1" o-- "0..*" Ressource
 
 Workflow "1" o-- "0..*" ResourceSet
-Workflow "1" o-- "0..*" WorkflowSchedule
+Workflow "1" o-- "0..1" WorkflowSchedule
 Workflow "1" o-- "0..*" Graph
 
 Graph "1" o-- "0..*" Resources
diff --git a/doc/oclib.png b/doc/oclib.png
index d554429..bbaad5e 100644
Binary files a/doc/oclib.png and b/doc/oclib.png differ
diff --git a/graphic_element.go b/graphic_element.go
new file mode 100644
index 0000000..b99325e
--- /dev/null
+++ b/graphic_element.go
@@ -0,0 +1,12 @@
+package oclib
+
+type Coordinate struct {
+	x	int
+	y 	int
+}
+
+type GraphicElement struct{
+	ID		string		`json:"ID" required:"true"`
+	style	string		`json:"style" required:"true"`
+	xy		Coordinate	`json:"xy" required:"true"`
+}
\ No newline at end of file
diff --git a/link.go b/link.go
new file mode 100644
index 0000000..7cd12b9
--- /dev/null
+++ b/link.go
@@ -0,0 +1,7 @@
+package oclib
+
+type Link struct {
+	Source		string
+	Destination	string
+}
+
diff --git a/mongo.go b/mongo.go
new file mode 100644
index 0000000..c558633
--- /dev/null
+++ b/mongo.go
@@ -0,0 +1,187 @@
+package oclib
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"os"
+	"time"
+
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+	"go.mongodb.org/mongo-driver/x/bsonx"
+)
+
+var (
+	mngoClient *mongo.Client
+	mngoDB     *mongo.Database
+	MngoCtx    context.Context
+
+	MngoCollData       *mongo.Collection
+	MngoCollComputing  *mongo.Collection
+	MngoCollStorage    *mongo.Collection
+	MngoCollDatacenter *mongo.Collection
+	MngoCollWorkspace  *mongo.Collection
+	MngoCollSchedule   *mongo.Collection
+)
+
+// Trying to get vscode to display this
+func MongoInit() {
+
+	// var baseConfig string
+	var err error
+	var cancel context.CancelFunc
+	var conf map[string]string
+	var MongoURL string
+	var DBname string
+	
+	db_conf, err := os.ReadFile("oclib_conf.json")
+	if err != nil {
+		logger.Fatal().Msg("Could not find configuration file")
+	}
+
+	json.Unmarshal(db_conf,&conf)
+	
+	
+	if len(os.Getenv("DOCKER_ENVIRONMENT")) == 0 {
+		MongoURL = conf["DB_URL_LOCAL"]
+	} else {
+		MongoURL = conf["DB_URL_DOCKER"]
+	}
+
+	DBname = conf["DCNAME"] + "-" + conf["DBPOINT"]
+
+	// MongoURL, err := beego.AppConfig.String(baseConfig + "::url")
+	// if err != nil {
+	// 	logger.Critical().Msg("MongoDB URI error: %v", err)
+	// 	panic(err)
+	// }
+
+	logger.Info().Msg("Connecting to" + MongoURL)
+	MngoCtx, cancel = context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	createClient(MongoURL)
+
+	logger.Info().Msg("Connecting mongo client to db " + DBname)
+	prepareDB(conf["DCNAME"],conf["DBPOINT"])
+
+	logger.Info().Msg("Database is READY")
+
+}
+
+// TODO : Soit retourner MngoCtx, soit comprendre comment passer sa référence et la mettre à jour
+func createClient(MongoURL string){
+
+	var err error
+
+	clientOptions := options.Client().ApplyURI(MongoURL)
+	
+	mngoClient, _ = mongo.NewClient(options.Client().ApplyURI(MongoURL))
+
+	if err = mngoClient.Connect(MngoCtx); err != nil {
+		logger.Fatal().Msg("Mongodb NewClient " + MongoURL + ":"  + "err" )
+		panic(err)
+	}
+
+
+	// Ping the primary
+	if mngoClient, err = mongo.Connect(MngoCtx, clientOptions); err != nil {
+		logger.Fatal().Msg("Mongodb connect " + MongoURL + ":"  + "err" )
+		panic(err)
+	}
+
+	if err = mngoClient.Ping(MngoCtx, nil); err != nil {
+		logger.Fatal().Msg("Mongodb ping " + MongoURL + ":"  + "err" )
+		panic(err)
+	}
+
+}
+
+func prepareDB(dc_name string, db_point string) {
+
+	// var err error
+	DBname := dc_name + "-"  + db_point
+
+	mngoDB = mngoClient.Database(DBname)
+
+	MngoCollData = mngoDB.Collection("Data")
+	MngoCollComputing = mngoDB.Collection("Computing")
+	MngoCollStorage = mngoDB.Collection("Storage")
+	MngoCollDatacenter = mngoDB.Collection("Datacenter")
+	MngoCollWorkspace = mngoDB.Collection("Workspace")
+	MngoCollSchedule = mngoDB.Collection("Schedule")
+
+	list_collection := [...]string{"Data","Computing","Storage","Datacenter","Workspace","Schedule"}
+
+	for _, collection_name := range(list_collection){
+		new_collection := mngoDB.Collection(collection_name)
+		createCollection(new_collection)
+	}
+
+
+
+	
+
+	// if _, err = MngoCollComputing.Indexes().CreateMany(MngoCtx, []mongo.IndexModel{
+	// 	{
+	// 		Keys: bsonx.Doc{
+	// 			{Key: "description", Value: bsonx.String("text")},
+	// 			{Key: "owner", Value: bsonx.String("text")},
+	// 			{Key: "license", Value: bsonx.String("text")},
+	// 		},
+	// 	},
+	// }); err != nil && err.(mongo.CommandError).Code != 85 {
+	// 	logger.Critical().Msg(err)
+	// 	panic(err)
+	// }
+
+	// if _, err = MngoCollStorage.Indexes().CreateMany(MngoCtx, []mongo.IndexModel{
+	// 	{
+	// 		Keys: bsonx.Doc{
+	// 			{Key: "name", Value: bsonx.String("text")},
+	// 			{Key: "description", Value: bsonx.String("text")},
+	// 		},
+	// 	},
+	// }); err != nil && err.(mongo.CommandError).Code != 85 {
+	// 	logger.Critical().Msg(err)
+	// 	panic(err)
+	// }
+
+	// if _, err = MngoCollDatacenter.Indexes().CreateMany(MngoCtx, []mongo.IndexModel{
+	// 	{
+	// 		Keys: bsonx.Doc{
+	// 			{Key: "name", Value: bsonx.String("text")},
+	// 			{Key: "description", Value: bsonx.String("text")},
+	// 			{Key: "owner", Value: bsonx.String("text")},
+	// 		},
+	// 	},
+	// }); err != nil && err.(mongo.CommandError).Code != 85 {
+	// 	logger.Critical().Msg(err)
+	// 	panic(err)
+	// }
+}
+
+func createCollection(new_collection *mongo.Collection)  {
+
+	var err error 
+
+	if _, err = new_collection.Indexes().CreateMany(MngoCtx, []mongo.IndexModel{
+		{
+			Keys: bsonx.Doc{
+				{Key: "description", Value: bsonx.String("text")},
+				{Key: "example", Value: bsonx.String("text")},
+			},
+		},
+	}); err != nil {
+		var cmdErr mongo.CommandError
+		if errors.As(err, &cmdErr) && cmdErr.Code != 85 {
+			logger.Fatal().Msg("It failed but I saw it: " + err.Error())
+			panic(err)
+		} else if !errors.As(err, &cmdErr) {
+			logger.Fatal().Msg("Unexpected error: " + err.Error())
+			panic(err)
+		}
+	}
+
+}
\ No newline at end of file
diff --git a/mongo_test.go b/mongo_test.go
new file mode 100644
index 0000000..576318a
--- /dev/null
+++ b/mongo_test.go
@@ -0,0 +1,10 @@
+package oclib
+
+import (
+	"fmt"
+	"testing"
+)
+func TestMongoInit(T *testing.T){
+	MongoInit()
+	fmt.Printf("It worked !")
+}
\ No newline at end of file
diff --git a/oclib_conf.json b/oclib_conf.json
new file mode 100644
index 0000000..fa909a7
--- /dev/null
+++ b/oclib_conf.json
@@ -0,0 +1,6 @@
+{
+    "DB_URL_LOCAL" : "mongodb://127.0.0.1:27017",
+    "DB_URL_DOCKER": "mongodb://mongo:27017/",
+    "DBPOINT" : "oclib_tests",
+    "DCNAME" : "testDC"
+}
\ No newline at end of file
diff --git a/processing.go b/processing.go
new file mode 100644
index 0000000..3a65715
--- /dev/null
+++ b/processing.go
@@ -0,0 +1,30 @@
+package oclib
+
+type Processing struct {
+	Resource
+	Container		string					`json:"Container"`	// We could create a specific class for container, that could check if the name exists/is available
+	Repository		string					`json:"Repository"`	// Indicate where to find the container image	=> Could add a struct handling authentication to the repo
+	Command			string					`json:"Command"`
+	Arguments		[]string				`json:"Arguments"`
+	Environment		[]map[string]string		`json:"Environment"`	// a key/value struct is what ressembles the most a NAME=VALUE struct
+
+	ExecutionRequirements ExecutionRequirementsModel	`json:"ExecutionRequirements"`
+
+	Price			uint					`json:"Price"`
+	License			string					`json:"License"`
+	
+}
+
+type ExecutionRequirementsModel struct {
+	CPUs 			uint `json:"cpus" required:"true"`
+	GPUs 			uint `json:"gpus" description:"Amount of GPUs needed"`
+	RAM  			uint `json:"ram" required:"true" description:"Units in MB"`
+
+	Parallel     	bool   `json:"parallel"`
+	ScalingModel 	uint   `json:"scaling_model"`
+	DiskIO       	string `json:"disk_io"`
+}
+
+func (p *Processing) GetType() ResourceType{
+	return PROCESSING
+}
diff --git a/resource.go b/resource.go
index 12eea5c..c8defbb 100644
--- a/resource.go
+++ b/resource.go
@@ -1,12 +1,94 @@
 package oclib
 
-type Resource struct {
-	Id               string
-	Name             string
-	ShortDescription string
-	Description      string
-	Logo             string
-	Owner            string
-	OwnerLogo        string
-	SourceUrl        string
+import (
+	"go.mongodb.org/mongo-driver/bson/primitive"
+)
+
+// AbstractResource is the struct containing all of the attributes commons to all ressources
+
+// Resource is the interface to be implemented by all classes inheriting from Resource to have the same behavior
+
+//http://www.inanzzz.com/index.php/post/wqbs/a-basic-usage-of-int-and-string-enum-types-in-golang
+
+type ResourceType int
+
+const (
+	INVALID 	ResourceType = iota
+	DATA		
+	PROCESSING	
+	STORAGE		
+	DATACENTER
+	WORKFLOW	
+)
+
+var extensions = [...]string{
+	"INVALID",
+	"DATA",
+	"PROCESSING",
+	"STORAGE",
+	"DATACENTER",
+	"WORKFLOW",
 }
+
+
+type Resource interface{
+	GetType()				ResourceType
+	getOneResourceByID()	Resource
+}
+
+type AbstractResource struct {
+	Uuid			 	string			`json:"Id" required:"true" `
+	Name             	string			`json:"Name" required:"true" `
+	ShortDescription 	string
+	Description      	string
+	Logo             	string
+	Owner            	string
+	OwnerLogo        	string
+	SourceUrl        	string
+
+	Graphic			 	GraphicElement	`json:"GraphicElement" `
+}
+
+
+// func (r *AbstractResource) getOneResourceByID(id string, resType ResourceType){
+
+
+// 	targetDBCollection := r.GetType().MongoCollection()		// Change the rType by the result of reflect
+// 	var retObj interface{}
+
+	
+
+// 	filter := bson.M{"_id": getObjIDFromString(id)}
+
+// 	res := targetDBCollection.FindOne(services.MngoCtx, filter)
+// 	res.Decode(retObj)
+
+// 	if res.Err() != nil {
+// 		logs.Warn("Couldn't find resource: " + res.Err().Error())
+// 	}
+
+// 	return retObj, res.Err()
+// }
+
+func getObjIDFromString(id string) interface{} {
+	objectID, err := primitive.ObjectIDFromHex(id)
+	if err == nil {
+		return objectID
+	}
+
+	return id
+}
+
+func postToMongo(id string) {
+	
+}
+
+func (r *AbstractResource) isLinked(){
+	// Get the link collection in this workflow
+	// test if the current resource is a dest OR a source at least one
+	// (len(slice[r.ID == dest]) > 0 || len(slice[r.ID == 1]) > 1 )
+}
+
+// func (r *Resource) GetType() ResourceType {
+// 	return INVALID
+// }
\ No newline at end of file
diff --git a/resource_set.go b/resource_set.go
index 692632c..12c28c0 100644
--- a/resource_set.go
+++ b/resource_set.go
@@ -1 +1,6 @@
 package oclib
+
+// Resources' key must be the Resource' Uuid, to garanty the set-like structure
+type WorkflowSet struct{
+	Resources	map[string]Resource
+}
\ No newline at end of file
diff --git a/storage.go b/storage.go
index 692632c..eb74204 100644
--- a/storage.go
+++ b/storage.go
@@ -1 +1,22 @@
 package oclib
+
+type URL struct {
+	Protocol	string	`json:"protocol"`
+	Path		string	`json:"path"`
+}
+
+type Storage struct {
+	Resource			`json:"resource" required:"true"`
+
+	Capacity	uint	`json:"capacity" required:"true"`
+	Url			URL		`json:"URL" `		// Will allow to select between several protocols 
+
+	Encryption   bool   `json:"encryption" `
+	Redundancy   string `json:"redundancy" `
+	Throughput   string `json:"throughput" `
+	BookingPrice uint   `json:"bookingPrice" `
+}
+
+func (s *Storage) GetType() ResourceType{
+	return STORAGE
+}
diff --git a/workflow.go b/workflow.go
new file mode 100644
index 0000000..43f2fed
--- /dev/null
+++ b/workflow.go
@@ -0,0 +1,25 @@
+package oclib
+
+type Workflow struct{
+	Resource
+	Datas		map[string]Data
+	Storages	map[string]Storage
+	Processing	map[string]Processing
+	Datacenters	map[string]Datacenter
+	Links		map[string]Link
+
+	Schedule	WorkflowSchedule
+}
+
+func (w *Workflow) isDCLink(link Link) bool {
+	if _, exists := w.Datacenters[link.Destination]; exists {
+        return true
+    } else if _, exists := w.Datacenters[link.Source]; exists {
+        return true
+    }
+	
+	return false
+}
+
+
+
diff --git a/workflow_schedule.go b/workflow_schedule.go
index 692632c..7d5d5a1 100644
--- a/workflow_schedule.go
+++ b/workflow_schedule.go
@@ -1 +1,15 @@
 package oclib
+
+import "time"
+
+type WorkflowSchedule struct {
+	Id		string `json:"id"`
+	Start	time.Time 
+	End		time.Time
+	Cron	string
+}
+
+func (ws *WorkflowSchedule) GetAllDates() (timetable []time.Time){
+	// Return all the execution time generated by the Cron
+	return
+}
\ No newline at end of file