This interfaces gives access to a dictionary entry.
A dictionary entry can supply a word and its hyhenation
and indicate if it is a negative word.
If it is a negative entry it may supply a replacement text to
be used instead of the entry word.
Hyphenation positions are represented by an '=' in the word.
If the '=' is the last character of the word this means it should not
be hyphenated. If there is no '=' charcter in the word, hyphenation
positions will be determined automatically (i.e., from the hyphenator
service alone).
Entries whose words only differ in hyphenation are considered
to be equal. Also a '.' at the end of the word will make no
difference.
