/// <summary>
/// Takes an occurance and adds it into the syntatic categories
/// dictionary.
/// </summary>
/// <param name="occurance"></param>
private void AddToSyntaticCategory(SyntaticOccurance occurance)
{
if (!SyntaticCategories.ContainsKey(occurance.Category))
{
SyntaticCategories.Add(occurance.Category, new List <SyntaticOccurance>());
}
SyntaticCategories[occurance.Category].Add(occurance);
}
