VALID_EXPLICIT_LOWERCASE_TRUE=true
VALID_EXPLICIT_LOWERCASE_FALSE=false
VALID_EXPLICIT_UPPERCASE_TRUE=TRUE
VALID_EXPLICIT_UPPERCASE_FALSE=FALSE
VALID_EXPLICIT_MIXEDCASE_TRUE=True
VALID_EXPLICIT_MIXEDCASE_FALSE=False

VALID_NUMBER_TRUE=1
VALID_NUMBER_FALSE=0

VALID_ONOFF_LOWERCASE_TRUE=on
VALID_ONOFF_LOWERCASE_FALSE=off
VALID_ONOFF_UPPERCASE_TRUE=ON
VALID_ONOFF_UPPERCASE_FALSE=OFF
VALID_ONOFF_MIXEDCASE_TRUE=On
VALID_ONOFF_MIXEDCASE_FALSE=Off

VALID_YESNO_LOWERCASE_TRUE=yes
VALID_YESNO_LOWERCASE_FALSE=no
VALID_YESNO_UPPERCASE_TRUE=YES
VALID_YESNO_UPPERCASE_FALSE=NO
VALID_YESNO_MIXEDCASE_TRUE=Yes
VALID_YESNO_MIXEDCASE_FALSE=No

INVALID_SOMETHING=something
INVALID_EMPTY=
INVALID_EMPTY_STRING=""
INVALID_NULL=null
INVALID_NUMBER_POSITIVE=2
INVALID_NUMBER_NEGATIVE=-2
INVALID_MINUS=-
INVALID_TILDA=~
INVALID_EXCLAMATION=!