typedef enum {
     icSigCurveType                  = 0x63757276L,    /* 'curv' */
     icSigDataType                   = 0x64617461L,    /* 'data' */
     icSigDateTimeType               = 0x6474696DL,    /* 'dtim' */
     icSigLut16Type                  = 0x6d667432L,    /* 'mft2' */
     icSigLut8Type                   = 0x6d667431L,    /* 'mft1' */
     icSigMeasurementType            = 0x6D656173L,    /* 'meas' */
     icSigNamedColorType             = 0x6E636f6CL,    /* `ncol' , obsolete, use `ncl2' */
     icSigProfileSequenceDescType    = 0x70736571L,    /* 'pseq' */
     icSigS15Fixed16ArrayType        = 0x73663332L,    /* 'sf32' */
     icSigScreeningType              = 0x7363726EL,    /* 'scrn' */
     icSigSignatureType              = 0x73696720L,    /* 'sig ' */
     icSigTextType                   = 0x74657874L,    /* 'text' */
     icSigTextDescriptionType        = 0x64657363L,    /* 'desc' */
     icSigU16Fixed16ArrayType        = 0x75663332L,    /* 'uf32' */
     icSigUcrBgType                  = 0x62666420L,    /* 'bfd ' */
     icSigUInt16ArrayType            = 0x75693136L,    /* 'ui16' */
     icSigUInt32ArrayType            = 0x75693332L,    /* 'ui32' */
     icSigUInt64ArrayType            = 0x75693634L,    /* 'ui64' */
     icSigUInt8ArrayType             = 0x75693038L,    /* 'ui08' */
     icSigViewingConditionsType      = 0x76696577L,    /* 'view' */
     icSigXYZType                    = 0x58595A20L,    /* 'XYZ ' */
     icSigXYZArrayType               = 0x58595A20L,    /* 'XYZ ' */
     icSigNamedColor2Type            = 0x6E636C32L,    /* 'ncl2' */
     icMaxEnumType                   = 0xFFFFFFFFL     /* enum = 4 bytes max */
 } icTagTypeSignature;