Development of a Stemmer for the Greek Language - SAIS

Rule-set 13
if (word ends on ΗΘΗΚΑ|ΗΘΗΚΕΣ|ΗΘΗΚΕ){
remove the suffix;
}
if (word ends on ΗΚΑ|ΗΚΕΣ|ΗΚΕ){
remove the suffix;
If (remaining part is ∆ΙΑΘ|Θ|ΣΥΝΘ…) ||
(remaining part ends on ΣΦ|ΟΘ|ΠΙΘ…){
add “ΗΚ”;
}
}
The rule removes the suffix ΗΘΗΚΑ, ΗΘΗΚΕΣ and ΗΘΗΚΕ for all the words,
and the suffixes ΗΚΑ, ΗΚΕΣ and ΗΚΕ for a group of words.
Example:
ΧΤΙΖΩ ΧΤΙΖ*
ΧΤΙΣΤΗΚΕ ΧΤΙΣΤ*
The rule doesn’t affect one group of words that by chance have similar suffixes.
Example:
∆ΙΑΘΗΚΗ ∆ΙΑΘΗΚ
∆ΙΑΘΗΚΕΣ ∆ΙΑΘΗΚ
*Notice the difference on the present and the past stem
Rule-set 14
if (word ends on ΟΥΣΑ|ΟΥΣΕΣ|ΟΥΣΕ){
remove the suffix;
if (remaining part is ΦΑΡΜΑΚ|ΧΑ∆|ΜΕ∆…) || (remaining
part ends on ΠΟ∆ΑΡ|ΒΛΕΠ…) || (remaining part ends on
vowel){
add “ΟΥΣ”;
}
}
The rule removes the suffix ΟΥΣΑ, ΟΥΣΕΣ and ΟΥΣΕ for a group of words.
Example:
ΧΤΥΠΩ ΧΤΥΠ
ΧΤΥΠΟΥΣΕΣ ΧΤΥΠ
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