c     = inappropriate use of capitals or lower case letters
cs    = comma splice
e     = word ending error (missing "s" or "e", etc.)
fs    = fused sentence (run-on sentence)
h     = homonym (using "to" instead of "too," etc.
mm    = nmisplaced modifier
p     = punctuation (missing, incorrect, or unnecessary
        punctuation marks)
paa   = pronoun/antecedent agreement error
pami  = pronoun antecedent missing or inappropriate
sf    = sentence fragment
si    = split infinitive
sp    = spelling error
sva   = subject/verb agreement
ts    = verb tense shift
typo  = typographical error
vt    = inappropriate verb tense
wc    = inappropriate choice of words
wm    = word missing
x     = other


EXAMPLES:

sva c 		 My mother need to stop smoking a Pack a day
paa h              because you may get lung cancer. Like to many
e p sp             heavy smoker, she just doesnt seem to relize
paa sva fs       their life were at stake this make me upset.

p c p	            In John Hickss article "The farmers 
p p sva sp        Grievances he describe the problms faced
typo cs             by framers in the industrial age, they
wm sp              suffered from the of suden change.
 
     
[SOURCE: Ann Erickson Healy, University of Wisconsin-Milwaukee]