/// <summary>
/// default constructor
/// </summary>
public Tag()
{
this.Position = new HistoryPoint();
}
/// <summary>
///parametered constructor
///<param name="ID" />
///Identificator of Tag
///<param name="Position" />
///Position of tag
///</summary>
public Tag(string ID, Point Position)
{
this.Position = new HistoryPoint();
this.ID = ID;
this.Position.Value = Position;
}