     let customClass: String?
     let customModule: String?
   }
-  
+
   enum XML {
-    static let scenePath = "/document/scenes/scene/objects/*[@sceneMemberID=\"viewController\"]"
-    static let seguePath = "/document/scenes/scene//connections/segue[string(@identifier)]"
+    enum Path {
+      static let scene = "/document/scenes/scene/objects/*[@sceneMemberID=\"viewController\"]"
+      static let segue = "/document/scenes/scene//connections/segue[string(@identifier)]"
+    }
+    enum Tag {
+      static let placeholder = "viewControllerPlaceholder"
+    }
+    enum Attribute {
+      static let customClass = "customClass"
+      static let customModule = "customModule"
+      static let id = "id"
+      static let identifier = "identifier"
+      static let initialVC = "initialViewController"
+      static let storyboardIdentifier = "storyboardIdentifier"
+    }
   }
 
   var initialScenes = [String: InitialScene]()

    let document = try Fuzi.XMLDocument(string: try path.read())

    let storyboardName = path.lastComponentWithoutExtension
    let initialSceneID = document.root?["initialViewController"]
    var initialScene: InitialScene? = nil
    var scenes = Set<Scene>()
    var segues = Set<Segue>()

    for scene in document.xpath(XML.scenePath) {
      guard scene.tag != "viewControllerPlaceholder" else { continue }

      let customClass = scene["customClass"]
      let customModule = scene["customModule"]

      if scene["id"] == initialSceneID {
        initialScene = InitialScene(tag: scene.tag ?? "",
                                    customClass: customClass,
                                    customModule: customModule)
      }
      if let id = scene["storyboardIdentifier"] {
        scenes.insert(Scene(storyboardID: id,
                            tag: scene.tag ?? "",
                            customClass: customClass,

      }
    }

    for segue in document.xpath(XML.Path.segue) {
      let id = segue[XML.Attribute.identifier] ?? ""
      let customClass = segue[XML.Attribute.customClass]
      let customModule = segue[XML.Attribute.customModule]

      segues.insert(Segue(identifier: id, customClass: customClass, customModule: customModule))
    }
