Document.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using yEd.XGML.DocumentEntities.Base;
using yEd.XGML.DocumentEntities.NodeEntitie;
using yEd.XGML.DocumentEntities.EdgeEntitie;
using yEd.XGML.DocumentEntities.GroupNodeEntitie;

namespace yEd.XGML.DocumentEntities
{
    public class Document
    {
        public string Creator { set; get; } = "yFiles";
        public string Version { set; get; } = "2.14";


        public int hierarchic => 1;
        public string label => "";
        public int directed => 1;


        public Dictionary<int, IElement> Elements { private set; get; } = new Dictionary<int, IElement>();

        //public IDictionary<int, Node> Nodes => Elements.OfType<>();


        public List<Edge> Edges { private set; get; } = new List<Edge>();
    }
}