HFST: English Numerals Script

See HfstEnglishNumerals for more information.

# From "one" to "nine":
echo "one
two
three
four
five
six
seven
eight
nine" | hfst-strings2fst -j -f $FORMAT > OneToNine.hfst

# It is convenient to define a set of prefixes that can be followed either by "teen" or by "ty":
echo "thir
fif
six
seven
eigh
nine" | hfst-strings2fst -j -f $FORMAT > TeenTen.hfst

# From "ten" to "nineteen":
echo "ten
eleven
twelve" | hfst-strings2fst -j -f $FORMAT > TenElevenTwelve.hfst;
echo "teen" | hfst-strings2fst -f $FORMAT > Teen.hfst;
echo "four" | hfst-strings2fst -f $FORMAT | hfst-disjunct TeenTen.hfst | hfst-concatenate -2 Teen.hfst | hfst-disjunct TenElevenTwelve.hfst > Teens.hfst;

# Let's define a set of prefixes that can be followed by "ty".
echo "twen
for" | hfst-strings2fst -j -f $FORMAT | hfst-disjunct TeenTen.hfst > TenStem.hfst

# TenStem is followed either by "ty" or by ty-" and a number from OneToNine.
echo "ty" | hfst-strings2fst -f $FORMAT | hfst-concatenate -1 TenStem.hfst > TMP.hfst;
echo "" | hfst-strings2fst -f $FORMAT > Epsilon.hfst;
echo "-" | hfst-strings2fst -f $FORMAT | hfst-concatenate -2 OneToNine.hfst | hfst-disjunct Epsilon.hfst | hfst-concatenate -1 TMP.hfst > Tens.hfst

# Let's disjunct all numbers
hfst-disjunct OneToNine.hfst Teens.hfst | hfst-disjunct -2 Tens.hfst > OneToNinetyNine.hfst

# Done. Let's test the transducer.
# TODO...

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-- ErikAxelson - 2011-09-01