CATEGORY_CUBE
    CUBEKPIMEMBER           ***  Not yet Implemented
    CUBEMEMBER              ***  Not yet Implemented
    CUBEMEMBERPROPERTY      ***  Not yet Implemented
    CUBERANKEDMEMBER        ***  Not yet Implemented
    CUBESET                 ***  Not yet Implemented
    CUBESETCOUNT            ***  Not yet Implemented
    CUBEVALUE               ***  Not yet Implemented

CATEGORY_DATABASE
    DAVERAGE                PHPExcel_Calculation_Database::DAVERAGE
    DCOUNT                  PHPExcel_Calculation_Database::DCOUNT
    DCOUNTA                 PHPExcel_Calculation_Database::DCOUNTA
    DGET                    PHPExcel_Calculation_Database::DGET
    DMAX                    PHPExcel_Calculation_Database::DMAX
    DMIN                    PHPExcel_Calculation_Database::DMIN
    DPRODUCT                PHPExcel_Calculation_Database::DPRODUCT
    DSTDEV                  PHPExcel_Calculation_Database::DSTDEV
    DSTDEVP                 PHPExcel_Calculation_Database::DSTDEVP
    DSUM                    PHPExcel_Calculation_Database::DSUM
    DVAR                    PHPExcel_Calculation_Database::DVAR
    DVARP                   PHPExcel_Calculation_Database::DVARP

CATEGORY_DATE_AND_TIME
    DATE                    PHPExcel_Calculation_DateTime::DATE
    DATEDIF                 PHPExcel_Calculation_DateTime::DATEDIF
    DATEVALUE               PHPExcel_Calculation_DateTime::DATEVALUE
    DAY                     PHPExcel_Calculation_DateTime::DAYOFMONTH
    DAYS360                 PHPExcel_Calculation_DateTime::DAYS360
    EDATE                   PHPExcel_Calculation_DateTime::EDATE
    EOMONTH                 PHPExcel_Calculation_DateTime::EOMONTH
    HOUR                    PHPExcel_Calculation_DateTime::HOUROFDAY
    MINUTE                  PHPExcel_Calculation_DateTime::MINUTEOFHOUR
    MONTH                   PHPExcel_Calculation_DateTime::MONTHOFYEAR
    NETWORKDAYS             PHPExcel_Calculation_DateTime::NETWORKDAYS
    NOW                     PHPExcel_Calculation_DateTime::DATETIMENOW
    SECOND                  PHPExcel_Calculation_DateTime::SECONDOFMINUTE
    TIME                    PHPExcel_Calculation_DateTime::TIME
    TIMEVALUE               PHPExcel_Calculation_DateTime::TIMEVALUE
    TODAY                   PHPExcel_Calculation_DateTime::DATENOW
    WEEKDAY                 PHPExcel_Calculation_DateTime::DAYOFWEEK
    WEEKNUM                 PHPExcel_Calculation_DateTime::WEEKOFYEAR
    WORKDAY                 PHPExcel_Calculation_DateTime::WORKDAY
    YEAR                    PHPExcel_Calculation_DateTime::YEAR
    YEARFRAC                PHPExcel_Calculation_DateTime::YEARFRAC

CATEGORY_ENGINEERING
    BESSELI                 PHPExcel_Calculation_Engineering::BESSELI
    BESSELJ                 PHPExcel_Calculation_Engineering::BESSELJ
    BESSELK                 PHPExcel_Calculation_Engineering::BESSELK
    BESSELY                 PHPExcel_Calculation_Engineering::BESSELY
    BIN2DEC                 PHPExcel_Calculation_Engineering::BINTODEC
    BIN2HEX                 PHPExcel_Calculation_Engineering::BINTOHEX
    BIN2OCT                 PHPExcel_Calculation_Engineering::BINTOOCT
    COMPLEX                 PHPExcel_Calculation_Engineering::COMPLEX
    CONVERT                 PHPExcel_Calculation_Engineering::CONVERTUOM
    DEC2BIN                 PHPExcel_Calculation_Engineering::DECTOBIN
    DEC2HEX                 PHPExcel_Calculation_Engineering::DECTOHEX
    DEC2OCT                 PHPExcel_Calculation_Engineering::DECTOOCT
    DELTA                   PHPExcel_Calculation_Engineering::DELTA
    ERF                     PHPExcel_Calculation_Engineering::ERF
    ERFC                    PHPExcel_Calculation_Engineering::ERFC
    GESTEP                  PHPExcel_Calculation_Engineering::GESTEP
    HEX2BIN                 PHPExcel_Calculation_Engineering::HEXTOBIN
    HEX2DEC                 PHPExcel_Calculation_Engineering::HEXTODEC
    HEX2OCT                 PHPExcel_Calculation_Engineering::HEXTOOCT
    IMABS                   PHPExcel_Calculation_Engineering::IMABS
    IMAGINARY               PHPExcel_Calculation_Engineering::IMAGINARY
    IMARGUMENT              PHPExcel_Calculation_Engineering::IMARGUMENT
    IMCONJUGATE             PHPExcel_Calculation_Engineering::IMCONJUGATE
    IMCOS                   PHPExcel_Calculation_Engineering::IMCOS
    IMDIV                   PHPExcel_Calculation_Engineering::IMDIV
    IMEXP                   PHPExcel_Calculation_Engineering::IMEXP
    IMLN                    PHPExcel_Calculation_Engineering::IMLN
    IMLOG10                 PHPExcel_Calculation_Engineering::IMLOG10
    IMLOG2                  PHPExcel_Calculation_Engineering::IMLOG2
    IMPOWER                 PHPExcel_Calculation_Engineering::IMPOWER
    IMPRODUCT               PHPExcel_Calculation_Engineering::IMPRODUCT
    IMREAL                  PHPExcel_Calculation_Engineering::IMREAL
    IMSIN                   PHPExcel_Calculation_Engineering::IMSIN
    IMSQRT                  PHPExcel_Calculation_Engineering::IMSQRT
    IMSUB                   PHPExcel_Calculation_Engineering::IMSUB
    IMSUM                   PHPExcel_Calculation_Engineering::IMSUM
    OCT2BIN                 PHPExcel_Calculation_Engineering::OCTTOBIN
    OCT2DEC                 PHPExcel_Calculation_Engineering::OCTTODEC
    OCT2HEX                 PHPExcel_Calculation_Engineering::OCTTOHEX

CATEGORY_FINANCIAL
    ACCRINT                 PHPExcel_Calculation_Financial::ACCRINT
    ACCRINTM                PHPExcel_Calculation_Financial::ACCRINTM
    AMORDEGRC               PHPExcel_Calculation_Financial::AMORDEGRC
    AMORLINC                PHPExcel_Calculation_Financial::AMORLINC
    COUPDAYBS               PHPExcel_Calculation_Financial::COUPDAYBS
    COUPDAYS                PHPExcel_Calculation_Financial::COUPDAYS
    COUPDAYSNC              PHPExcel_Calculation_Financial::COUPDAYSNC
    COUPNCD                 PHPExcel_Calculation_Financial::COUPNCD
    COUPNUM                 PHPExcel_Calculation_Financial::COUPNUM
    COUPPCD                 PHPExcel_Calculation_Financial::COUPPCD
    CUMIPMT                 PHPExcel_Calculation_Financial::CUMIPMT
    CUMPRINC                PHPExcel_Calculation_Financial::CUMPRINC
    DB                      PHPExcel_Calculation_Financial::DB
    DDB                     PHPExcel_Calculation_Financial::DDB
    DISC                    PHPExcel_Calculation_Financial::DISC
    DOLLARDE                PHPExcel_Calculation_Financial::DOLLARDE
    DOLLARFR                PHPExcel_Calculation_Financial::DOLLARFR
    DURATION                ***  Not yet Implemented
    EFFECT                  PHPExcel_Calculation_Financial::EFFECT
    FV                      PHPExcel_Calculation_Financial::FV
    FVSCHEDULE              PHPExcel_Calculation_Financial::FVSCHEDULE
    INTRATE                 PHPExcel_Calculation_Financial::INTRATE
    IPMT                    PHPExcel_Calculation_Financial::IPMT
    IRR                     PHPExcel_Calculation_Financial::IRR
    ISPMT                   PHPExcel_Calculation_Financial::ISPMT
    MDURATION               ***  Not yet Implemented
    MIRR                    PHPExcel_Calculation_Financial::MIRR
    NOMINAL                 PHPExcel_Calculation_Financial::NOMINAL
    NPER                    PHPExcel_Calculation_Financial::NPER
    NPV                     PHPExcel_Calculation_Financial::NPV
    ODDFPRICE               ***  Not yet Implemented
    ODDFYIELD               ***  Not yet Implemented
    ODDLPRICE               ***  Not yet Implemented
    ODDLYIELD               ***  Not yet Implemented
    PMT                     PHPExcel_Calculation_Financial::PMT
    PPMT                    PHPExcel_Calculation_Financial::PPMT
    PRICE                   PHPExcel_Calculation_Financial::PRICE
    PRICEDISC               PHPExcel_Calculation_Financial::PRICEDISC
    PRICEMAT                PHPExcel_Calculation_Financial::PRICEMAT
    PV                      PHPExcel_Calculation_Financial::PV
    RATE                    PHPExcel_Calculation_Financial::RATE
    RECEIVED                PHPExcel_Calculation_Financial::RECEIVED
    SLN                     PHPExcel_Calculation_Financial::SLN
    SYD                     PHPExcel_Calculation_Financial::SYD
    TBILLEQ                 PHPExcel_Calculation_Financial::TBILLEQ
    TBILLPRICE              PHPExcel_Calculation_Financial::TBILLPRICE
    TBILLYIELD              PHPExcel_Calculation_Financial::TBILLYIELD
    USDOLLAR                ***  Not yet Implemented
    VDB                     ***  Not yet Implemented
    XIRR                    PHPExcel_Calculation_Financial::XIRR
    XNPV                    PHPExcel_Calculation_Financial::XNPV
    YIELD                   ***  Not yet Implemented
    YIELDDISC               PHPExcel_Calculation_Financial::YIELDDISC
    YIELDMAT                PHPExcel_Calculation_Financial::YIELDMAT

CATEGORY_INFORMATION
    CELL                    ***  Not yet Implemented
    ERROR.TYPE              PHPExcel_Calculation_Functions::ERROR_TYPE
    INFO                    ***  Not yet Implemented
    ISBLANK                 PHPExcel_Calculation_Functions::IS_BLANK
    ISERR                   PHPExcel_Calculation_Functions::IS_ERR
    ISERROR                 PHPExcel_Calculation_Functions::IS_ERROR
    ISEVEN                  PHPExcel_Calculation_Functions::IS_EVEN
    ISLOGICAL               PHPExcel_Calculation_Functions::IS_LOGICAL
    ISNA                    PHPExcel_Calculation_Functions::IS_NA
    ISNONTEXT               PHPExcel_Calculation_Functions::IS_NONTEXT
    ISNUMBER                PHPExcel_Calculation_Functions::IS_NUMBER
    ISODD                   PHPExcel_Calculation_Functions::IS_ODD
    ISREF                   ***  Not yet Implemented
    ISTEXT                  PHPExcel_Calculation_Functions::IS_TEXT
    N                       PHPExcel_Calculation_Functions::N
    NA                      PHPExcel_Calculation_Functions::NA
    TYPE                    PHPExcel_Calculation_Functions::TYPE
    VERSION                 PHPExcel_Calculation_Functions::VERSION

CATEGORY_LOGICAL
    AND                     PHPExcel_Calculation_Logical::LOGICAL_AND
    FALSE                   PHPExcel_Calculation_Logical::FALSE
    IF                      PHPExcel_Calculation_Logical::STATEMENT_IF
    IFERROR                 PHPExcel_Calculation_Logical::IFERROR
    NOT                     PHPExcel_Calculation_Logical::NOT
    OR                      PHPExcel_Calculation_Logical::LOGICAL_OR
    TRUE                    PHPExcel_Calculation_Logical::TRUE

CATEGORY_LOOKUP_AND_REFERENCE
    ADDRESS                 PHPExcel_Calculation_LookupRef::CELL_ADDRESS
    AREAS                   ***  Not yet Implemented
    CHOOSE                  PHPExcel_Calculation_LookupRef::CHOOSE
    COLUMN                  PHPExcel_Calculation_LookupRef::COLUMN
    COLUMNS                 PHPExcel_Calculation_LookupRef::COLUMNS
    GETPIVOTDATA            ***  Not yet Implemented
    HLOOKUP                 PHPExcel_Calculation_LookupRef::HLOOKUP
    HYPERLINK               PHPExcel_Calculation_LookupRef::HYPERLINK
    INDEX                   PHPExcel_Calculation_LookupRef::INDEX
    INDIRECT                PHPExcel_Calculation_LookupRef::INDIRECT
    LOOKUP                  PHPExcel_Calculation_LookupRef::LOOKUP
    MATCH                   PHPExcel_Calculation_LookupRef::MATCH
    OFFSET                  PHPExcel_Calculation_LookupRef::OFFSET
    ROW                     PHPExcel_Calculation_LookupRef::ROW
    ROWS                    PHPExcel_Calculation_LookupRef::ROWS
    RTD                     ***  Not yet Implemented
    TRANSPOSE               PHPExcel_Calculation_LookupRef::TRANSPOSE
    VLOOKUP                 PHPExcel_Calculation_LookupRef::VLOOKUP

CATEGORY_MATH_AND_TRIG
    ABS                     abs
    ACOS                    acos
    ACOSH                   acosh
    ASIN                    asin
    ASINH                   asinh
    ATAN                    atan
    ATAN2                   PHPExcel_Calculation_MathTrig::REVERSE_ATAN2
    ATANH                   atanh
    CEILING                 PHPExcel_Calculation_MathTrig::CEILING
    COMBIN                  PHPExcel_Calculation_MathTrig::COMBIN
    COS                     cos
    COSH                    cosh
    DEGREES                 rad2deg
    EVEN                    PHPExcel_Calculation_MathTrig::EVEN
    EXP                     exp
    FACT                    PHPExcel_Calculation_MathTrig::FACT
    FACTDOUBLE              PHPExcel_Calculation_MathTrig::FACTDOUBLE
    FLOOR                   PHPExcel_Calculation_MathTrig::FLOOR
    GCD                     PHPExcel_Calculation_MathTrig::GCD
    INT                     PHPExcel_Calculation_MathTrig::INT
    LCM                     PHPExcel_Calculation_MathTrig::LCM
    LN                      log
    LOG                     PHPExcel_Calculation_MathTrig::LOG_BASE
    LOG10                   log10
    MDETERM                 PHPExcel_Calculation_MathTrig::MDETERM
    MINVERSE                PHPExcel_Calculation_MathTrig::MINVERSE
    MMULT                   PHPExcel_Calculation_MathTrig::MMULT
    MOD                     PHPExcel_Calculation_MathTrig::MOD
    MROUND                  PHPExcel_Calculation_MathTrig::MROUND
    MULTINOMIAL             PHPExcel_Calculation_MathTrig::MULTINOMIAL
    ODD                     PHPExcel_Calculation_MathTrig::ODD
    PI                      pi
    POWER                   PHPExcel_Calculation_MathTrig::POWER
    PRODUCT                 PHPExcel_Calculation_MathTrig::PRODUCT
    QUOTIENT                PHPExcel_Calculation_MathTrig::QUOTIENT
    RADIANS                 deg2rad
    RAND                    PHPExcel_Calculation_MathTrig::RAND
    RANDBETWEEN             PHPExcel_Calculation_MathTrig::RAND
    ROMAN                   PHPExcel_Calculation_MathTrig::ROMAN
    ROUND                   round
    ROUNDDOWN               PHPExcel_Calculation_MathTrig::ROUNDDOWN
    ROUNDUP                 PHPExcel_Calculation_MathTrig::ROUNDUP
    SERIESSUM               PHPExcel_Calculation_MathTrig::SERIESSUM
    SIGN                    PHPExcel_Calculation_MathTrig::SIGN
    SIN                     sin
    SINH                    sinh
    SQRT                    sqrt
    SQRTPI                  PHPExcel_Calculation_MathTrig::SQRTPI
    SUBTOTAL                PHPExcel_Calculation_MathTrig::SUBTOTAL
    SUM                     PHPExcel_Calculation_MathTrig::SUM
    SUMIF                   PHPExcel_Calculation_MathTrig::SUMIF
    SUMIFS                  ***  Not yet Implemented
    SUMPRODUCT              PHPExcel_Calculation_MathTrig::SUMPRODUCT
    SUMSQ                   PHPExcel_Calculation_MathTrig::SUMSQ
    SUMX2MY2                PHPExcel_Calculation_MathTrig::SUMX2MY2
    SUMX2PY2                PHPExcel_Calculation_MathTrig::SUMX2PY2
    SUMXMY2                 PHPExcel_Calculation_MathTrig::SUMXMY2
    TAN                     tan
    TANH                    tanh
    TRUNC                   PHPExcel_Calculation_MathTrig::TRUNC

CATEGORY_STATISTICAL
    AVEDEV                  PHPExcel_Calculation_Statistical::AVEDEV
    AVERAGE                 PHPExcel_Calculation_Statistical::AVERAGE
    AVERAGEA                PHPExcel_Calculation_Statistical::AVERAGEA
    AVERAGEIF               PHPExcel_Calculation_Statistical::AVERAGEIF
    AVERAGEIFS              ***  Not yet Implemented
    BETADIST                PHPExcel_Calculation_Statistical::BETADIST
    BETAINV                 PHPExcel_Calculation_Statistical::BETAINV
    BINOMDIST               PHPExcel_Calculation_Statistical::BINOMDIST
    CHIDIST                 PHPExcel_Calculation_Statistical::CHIDIST
    CHIINV                  PHPExcel_Calculation_Statistical::CHIINV
    CHITEST                 ***  Not yet Implemented
    CONFIDENCE              PHPExcel_Calculation_Statistical::CONFIDENCE
    CORREL                  PHPExcel_Calculation_Statistical::CORREL
    COUNT                   PHPExcel_Calculation_Statistical::COUNT
    COUNTA                  PHPExcel_Calculation_Statistical::COUNTA
    COUNTBLANK              PHPExcel_Calculation_Statistical::COUNTBLANK
    COUNTIF                 PHPExcel_Calculation_Statistical::COUNTIF
    COUNTIFS                ***  Not yet Implemented
    COVAR                   PHPExcel_Calculation_Statistical::COVAR
    CRITBINOM               PHPExcel_Calculation_Statistical::CRITBINOM
    DEVSQ                   PHPExcel_Calculation_Statistical::DEVSQ
    EXPONDIST               PHPExcel_Calculation_Statistical::EXPONDIST
    FDIST                   ***  Not yet Implemented
    FINV                    ***  Not yet Implemented
    FISHER                  PHPExcel_Calculation_Statistical::FISHER
    FISHERINV               PHPExcel_Calculation_Statistical::FISHERINV
    FORECAST                PHPExcel_Calculation_Statistical::FORECAST
    FREQUENCY               ***  Not yet Implemented
    FTEST                   ***  Not yet Implemented
    GAMMADIST               PHPExcel_Calculation_Statistical::GAMMADIST
    GAMMAINV                PHPExcel_Calculation_Statistical::GAMMAINV
    GAMMALN                 PHPExcel_Calculation_Statistical::GAMMALN
    GEOMEAN                 PHPExcel_Calculation_Statistical::GEOMEAN
    GROWTH                  PHPExcel_Calculation_Statistical::GROWTH
    HARMEAN                 PHPExcel_Calculation_Statistical::HARMEAN
    HYPGEOMDIST             PHPExcel_Calculation_Statistical::HYPGEOMDIST
    INTERCEPT               PHPExcel_Calculation_Statistical::INTERCEPT
    KURT                    PHPExcel_Calculation_Statistical::KURT
    LARGE                   PHPExcel_Calculation_Statistical::LARGE
    LINEST                  PHPExcel_Calculation_Statistical::LINEST
    LOGEST                  PHPExcel_Calculation_Statistical::LOGEST
    LOGINV                  PHPExcel_Calculation_Statistical::LOGINV
    LOGNORMDIST             PHPExcel_Calculation_Statistical::LOGNORMDIST
    MAX                     PHPExcel_Calculation_Statistical::MAX
    MAXA                    PHPExcel_Calculation_Statistical::MAXA
    MAXIF                   PHPExcel_Calculation_Statistical::MAXIF
    MEDIAN                  PHPExcel_Calculation_Statistical::MEDIAN
    MEDIANIF                ***  Not yet Implemented
    MIN                     PHPExcel_Calculation_Statistical::MIN
    MINA                    PHPExcel_Calculation_Statistical::MINA
    MINIF                   PHPExcel_Calculation_Statistical::MINIF
    MODE                    PHPExcel_Calculation_Statistical::MODE
    NEGBINOMDIST            PHPExcel_Calculation_Statistical::NEGBINOMDIST
    NORMDIST                PHPExcel_Calculation_Statistical::NORMDIST
    NORMINV                 PHPExcel_Calculation_Statistical::NORMINV
    NORMSDIST               PHPExcel_Calculation_Statistical::NORMSDIST
    NORMSINV                PHPExcel_Calculation_Statistical::NORMSINV
    PEARSON                 PHPExcel_Calculation_Statistical::CORREL
    PERCENTILE              PHPExcel_Calculation_Statistical::PERCENTILE
    PERCENTRANK             PHPExcel_Calculation_Statistical::PERCENTRANK
    PERMUT                  PHPExcel_Calculation_Statistical::PERMUT
    POISSON                 PHPExcel_Calculation_Statistical::POISSON
    PROB                    ***  Not yet Implemented
    QUARTILE                PHPExcel_Calculation_Statistical::QUARTILE
    RANK                    PHPExcel_Calculation_Statistical::RANK
    RSQ                     PHPExcel_Calculation_Statistical::RSQ
    SKEW                    PHPExcel_Calculation_Statistical::SKEW
    SLOPE                   PHPExcel_Calculation_Statistical::SLOPE
    SMALL                   PHPExcel_Calculation_Statistical::SMALL
    STANDARDIZE             PHPExcel_Calculation_Statistical::STANDARDIZE
    STDEV                   PHPExcel_Calculation_Statistical::STDEV
    STDEVA                  PHPExcel_Calculation_Statistical::STDEVA
    STDEVP                  PHPExcel_Calculation_Statistical::STDEVP
    STDEVPA                 PHPExcel_Calculation_Statistical::STDEVPA
    STEYX                   PHPExcel_Calculation_Statistical::STEYX
    TDIST                   PHPExcel_Calculation_Statistical::TDIST
    TINV                    PHPExcel_Calculation_Statistical::TINV
    TREND                   PHPExcel_Calculation_Statistical::TREND
    TRIMMEAN                PHPExcel_Calculation_Statistical::TRIMMEAN
    TTEST                   ***  Not yet Implemented
    VAR                     PHPExcel_Calculation_Statistical::VARFunc
    VARA                    PHPExcel_Calculation_Statistical::VARA
    VARP                    PHPExcel_Calculation_Statistical::VARP
    VARPA                   PHPExcel_Calculation_Statistical::VARPA
    WEIBULL                 PHPExcel_Calculation_Statistical::WEIBULL
    ZTEST                   PHPExcel_Calculation_Statistical::ZTEST

CATEGORY_TEXT_AND_DATA
    ASC                     ***  Not yet Implemented
    BAHTTEXT                ***  Not yet Implemented
    CHAR                    PHPExcel_Calculation_TextData::CHARACTER
    CLEAN                   PHPExcel_Calculation_TextData::TRIMNONPRINTABLE
    CODE                    PHPExcel_Calculation_TextData::ASCIICODE
    CONCATENATE             PHPExcel_Calculation_TextData::CONCATENATE
    DOLLAR                  PHPExcel_Calculation_TextData::DOLLAR
    EXACT                   ***  Not yet Implemented
    FIND                    PHPExcel_Calculation_TextData::SEARCHSENSITIVE
    FINDB                   PHPExcel_Calculation_TextData::SEARCHSENSITIVE
    FIXED                   PHPExcel_Calculation_TextData::FIXEDFORMAT
    JIS                     ***  Not yet Implemented
    LEFT                    PHPExcel_Calculation_TextData::LEFT
    LEFTB                   PHPExcel_Calculation_TextData::LEFT
    LEN                     PHPExcel_Calculation_TextData::STRINGLENGTH
    LENB                    PHPExcel_Calculation_TextData::STRINGLENGTH
    LOWER                   PHPExcel_Calculation_TextData::LOWERCASE
    MID                     PHPExcel_Calculation_TextData::MID
    MIDB                    PHPExcel_Calculation_TextData::MID
    PHONETIC                ***  Not yet Implemented
    PROPER                  PHPExcel_Calculation_TextData::PROPERCASE
    REPLACE                 PHPExcel_Calculation_TextData::REPLACE
    REPLACEB                PHPExcel_Calculation_TextData::REPLACE
    REPT                    str_repeat
    RIGHT                   PHPExcel_Calculation_TextData::RIGHT
    RIGHTB                  PHPExcel_Calculation_TextData::RIGHT
    SEARCH                  PHPExcel_Calculation_TextData::SEARCHINSENSITIVE
    SEARCHB                 PHPExcel_Calculation_TextData::SEARCHINSENSITIVE
    SUBSTITUTE              PHPExcel_Calculation_TextData::SUBSTITUTE
    T                       PHPExcel_Calculation_TextData::RETURNSTRING
    TEXT                    PHPExcel_Calculation_TextData::TEXTFORMAT
    TRIM                    PHPExcel_Calculation_TextData::TRIMSPACES
    UPPER                   PHPExcel_Calculation_TextData::UPPERCASE
    VALUE                   PHPExcel_Calculation_TextData::VALUE
