'A dictionary of custom word tags.
A word may be annotated with its part-of-speech tag (e.g., "cat/NN"),
phrase tag (e.g., "cat/NN/NP"), the prepositional noun phrase it is part of etc.
An example of an extra custom slot is its semantic type,
e.g., gene type, topic, and so on: "cat/NN/NP/genus_felis"'

def __init__(self, word, items=[]):

    if items:
        dict.__init__(self, items)
    self.word = word
