fileView/server/LibreOfficePortable/App/libreoffice/share/extensions/dict-en/affDescription.txt

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This file is a summary of the switches used in the en_GB affix file.
A description of the affix file format is appended to the end of this

In addition to the new suffix and prefix rules a modified TRY list is
used in order to properly find spelling errors in words having . (period)
' (apostrophe) and - (hyphen) within them. A replacement list for common
mis-spellings has also been incorporated.

The en_GB.aff affix file was created from scratch by David Bartlett and 
Andrew Brown.

15/12/02
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A re- Prefix
a mis- Prefix
B -able, -ability, last syllable of stem stressed, -ate words > 2 syllables
b -ible, very basic rules, only dropped e
C de- Prefix
c over- Prefix
D -ed, regular verb past tenses, last syllable of stem stressed
d -ed, -ing, regular verb past tenses and adverbial form, last syllable NOT stressed
E dis- Prefix for negation
e out- Prefix
F con- prefix
f under - Prefix
G -ing, ending for verbs, stress on last syllable of stem
g -ability, last syllable NOT stressed
H -th, -fold - number specific suffixes, both generated
h -edly, adverbial, simplified rules
I in- im- il- ir- Prefix, opposite of.
i -edness, degree, simplified rules
J -ings, plural noun version of verb ing ending, simplified rules
j -fully, suffix
K pre-, prefix
k -ingly, adverbial form, simplified rules
L -ment, -ments, -ment's, suffix, both generated
l -ably, simplified rules
M -'s, possessive form
m -man, -men, -man's, -men's suffixes, all generated
N -ion, noun from verb, stress on last syllable of stem
n -ion, -ions, noun from verb, stress NOT on last syllable of stem
O non- Prefix
o -ally, adverb from verb, simplified rules
P -ness, -ness's, adjective degree of comparison
p -less, comparative suffix
Q -ise, -ised, -ises, -ising, -ize, -ized, -izes, -izing, all generated!
q -isation, -isations, -ization, -izations, all generated
R -er, -ers, er's, doer, last syllable stressed, both forms generated
r -er, -ers, er's, doer, last syllable NOT stressed, both forms generated
S -s, noun plurals, verb conjugation
s -iser, -isers, -izer, -izers, -iser's, -izer's, all generated
T -er, -est, adjectival comparatives, both generated
t -isable, -isability, -izable, -izability, all generated
U un- Prefix
u -iveness, ending for verbs
V -ive, ending for verbs (simplified rules)
v -ively, ending for verbs
W -ic, adjectival ending, simplified rules
w -ical, adjectival ending, simplified rules
X -ions, noun plural, stress on last syllable of stem, simplified rules
x -ional, -ionally, simplified rules, both endings formed
Y -ly, adverb endings for adjectives
y -ry, adjectival and noun forms, simplified rules.
Z -y, diminutive and adjectival form, simplified rules
z -ily, adverbial ending where adjective adds y
0 -al, noun from verb, simplified rules
1 -ically, adverbial double suffix, simplified rules
2 -iness, y+ness ending, simplified rules
3 -ist, -ists, -ists's, professions
4 trans-, Prefix
5 -woman, -women, -woman's suffixes, all generated
6 -ful, suffix
7 -able, last syllable NOT stressed, -ate words <= 2 syllables
8
9

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To Do:
-ity
-en
-ify, -ified, -ifies, -ifing
-ism
-ish
-ous
-ously

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The following minor suffixes have been ignored, based on 
frequency counts in the standard word list
-fulness
-lessly
-lessness
-ousness
-ifier
-ification
-ward
-ship
-ishly
-ible
-ibility
-iveity
-edness
-icable
-icability
-ality
-alism
-ics
-ional
-ology
-ologist
-istic

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What follows is cut and pasted from the instructions at
http://whiteboard.openoffice.org/lingucomponent/affix.readme

The first line has 4 fields:

Field
-----
1     SFX - indicates this is a suffix
2     D   - is the name of the character which represents this suffix
3     Y   - indicates it can be combined with prefixes (cross product)
4     4   - indicates that sequence of 4 affix entries are needed to
               properly store the affix information

The remaining lines describe the unique information for the 4 affix
entries that make up this affix.  Each line can be interpreted
as follows: (note fields 1 and 2 are used as a check against line 1 info)

Field
-----
1     SFX         - indicates this is a suffix
2     D           - is the name of the character which represents this affix
3     y           - the string of chars to strip off before adding affix
                         (a 0 here indicates the NULL string)
4     ied         - the string of affix characters to add
                         (a 0 here indicates the NULL string)
5     [^aeiou]y   - the conditions which must be met before the affix
                    can be applied

Field 5 is interesting.  Since this is a suffix, field 5 tells us that
there are 2 conditions that must be met.  The first condition is that
the next to the last character in the word must *NOT* be any of the
following "a", "e", "i", "o" or "u".  The second condition is that
the last character of the word must end in "y".