diff --git a/Sources/Persistence/Protocols/Service.swift b/Sources/Persistence/Protocols/Service.swift
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+//
+//  Service.swift
+//  Persistence
+//
+//  Created by Javier Cicchelli on 13/04/2023.
+//  Copyright © 2023 Röck+Cöde. All rights reserved.
+//
+
+import CoreData
+
+public protocol Service {
+    
+    // MARK: Properties
+    
+    /// The main managed object context.
+    var viewContext: NSManagedObjectContext { get }
+    
+    // MARK: Functions
+    
+    /// Create a private queue context.
+    /// - Returns: A concurrent `NSManagedObjectContext` context instance ready to use.
+    func makeTaskContext() -> NSManagedObjectContext
+    
+    /// Create a child context of the view context.
+    /// - Returns: A generated child `NSManagedObjectContext` context instance ready to use.
+    func makeChildContext() -> NSManagedObjectContext
+    
+    /// Save a given context.
+    /// - Parameter context: A `NSManagedObjectContext` context instance to save.
+    func save(context: NSManagedObjectContext)
+    
+    /// Save a given child context as well as its respective parent context.
+    /// - Parameter context: A child `NSManagedObjectContext` context instance to save.
+    func save(childContext context: NSManagedObjectContext)
+    
+}