diff --git a/Documentation/Diagrammes/diagrammes.asta b/Documentation/Diagrammes/diagrammes.asta
index fd5ff37d..06c8e081 100644
Binary files a/Documentation/Diagrammes/diagrammes.asta and b/Documentation/Diagrammes/diagrammes.asta differ
diff --git a/Workspace/core/src/main/java/com/pqt/core/entities/product/LightweightProduct.java b/Workspace/core/src/main/java/com/pqt/core/entities/product/LightweightProduct.java
new file mode 100644
index 00000000..e13118ed
--- /dev/null
+++ b/Workspace/core/src/main/java/com/pqt/core/entities/product/LightweightProduct.java
@@ -0,0 +1,97 @@
+package com.pqt.core.entities.product;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class LightweightProduct {
+    private long id;
+    private String name;
+    private int amountRemaining;
+    private int amountSold;
+    private boolean sellable;
+    private double price;
+    private List<Long> componentIds;
+    private Category category;
+
+    public LightweightProduct() {
+        componentIds = new ArrayList<>();
+    }
+
+    public LightweightProduct(Product product) {
+        this.id = product.getId();
+        this.name = product.getName();
+        this.amountRemaining = product.getAmountRemaining();
+        this.amountSold = product.getAmountSold();
+        this.sellable = product.isSellable();
+        this.price = product.getPrice();
+        this.category = product.getCategory();
+        this.componentIds = new ArrayList<>();
+        if(componentIds!=null){
+            product.getComponents().stream().forEach((component -> componentIds.add(component.getId())));
+        }
+    }
+
+    public long getId() {
+        return id;
+    }
+
+    public void setId(long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAmountRemaining() {
+        return amountRemaining;
+    }
+
+    public void setAmountRemaining(int amountRemaining) {
+        this.amountRemaining = amountRemaining;
+    }
+
+    public int getAmountSold() {
+        return amountSold;
+    }
+
+    public void setAmountSold(int amountSold) {
+        this.amountSold = amountSold;
+    }
+
+    public boolean isSellable() {
+        return sellable;
+    }
+
+    public void setSellable(boolean sellable) {
+        this.sellable = sellable;
+    }
+
+    public double getPrice() {
+        return price;
+    }
+
+    public void setPrice(double price) {
+        this.price = price;
+    }
+
+    public List<Long> getComponentIds() {
+        return componentIds;
+    }
+
+    public void setComponentIds(List<Long> componentIds) {
+        this.componentIds = componentIds;
+    }
+
+    public Category getCategory() {
+        return category;
+    }
+
+    public void setCategory(Category category) {
+        this.category = category;
+    }
+}
diff --git a/Workspace/core/src/main/java/com/pqt/core/entities/sale/LightweightSale.java b/Workspace/core/src/main/java/com/pqt/core/entities/sale/LightweightSale.java
new file mode 100644
index 00000000..b605721d
--- /dev/null
+++ b/Workspace/core/src/main/java/com/pqt/core/entities/sale/LightweightSale.java
@@ -0,0 +1,102 @@
+package com.pqt.core.entities.sale;
+
+import com.pqt.core.entities.members.Client;
+import com.pqt.core.entities.product.Product;
+import com.pqt.core.entities.user_account.Account;
+
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Map;
+
+public class LightweightSale {
+
+    private int id;
+    private Map<Long, Integer> products;
+    private Date orderedAt;
+    private Client orderedWith;
+    private Account orderedBy;
+    private Account orderedFor;
+    private SaleType type;
+    private SaleStatus status;
+
+    public LightweightSale() {
+    }
+
+    public LightweightSale(Sale sale) {
+        this.id = sale.getId();
+        this.orderedAt = sale.getOrderedAt();
+        this.orderedWith = sale.getOrderedWith();
+        this.orderedBy = sale.getOrderedBy();
+        this.orderedFor = sale.getOrderedFor();
+        this.type = sale.getType();
+        this.status = sale.getStatus();
+        products = new HashMap<>();
+        for(Product product : sale.getProducts().keySet()){
+            products.put(product.getId(), sale.getProducts().get(product));
+        }
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public Map<Long, Integer> getProducts() {
+        return products;
+    }
+
+    public void setProducts(Map<Long, Integer> products) {
+        this.products = products;
+    }
+
+    public Date getOrderedAt() {
+        return orderedAt;
+    }
+
+    public void setOrderedAt(Date orderedAt) {
+        this.orderedAt = orderedAt;
+    }
+
+    public Client getOrderedWith() {
+        return orderedWith;
+    }
+
+    public void setOrderedWith(Client orderedWith) {
+        this.orderedWith = orderedWith;
+    }
+
+    public Account getOrderedBy() {
+        return orderedBy;
+    }
+
+    public void setOrderedBy(Account orderedBy) {
+        this.orderedBy = orderedBy;
+    }
+
+    public Account getOrderedFor() {
+        return orderedFor;
+    }
+
+    public void setOrderedFor(Account orderedFor) {
+        this.orderedFor = orderedFor;
+    }
+
+    public SaleType getType() {
+        return type;
+    }
+
+    public void setType(SaleType type) {
+        this.type = type;
+    }
+
+    public SaleStatus getStatus() {
+        return status;
+    }
+
+    public void setStatus(SaleStatus status) {
+        this.status = status;
+    }
+}