Here are possible combinations of ValueType and Value elements of AT_DATALIST_ITEM ImageGear metadata structure:

ValueType	Value
AM_TID_META_INT8	The "FLTR.METADATA_FORMAT" global parameter value is "text" : Value is pointer to NUL-terminated ASCII string - textual representation of "Length" 8-bit signed integers separated by comma. Example: "-128;0;+45;56" The "FLTR.METADATA_FORMAT" global parameter value is "binary" : Value is pointer to array of 8-bit signed integers of size "Length"
AM_TID_META_UINT8	The "FLTR.METADATA_FORMAT" global parameter value is "text" : Value is pointer to NUL-terminated ASCII string - textual representation of "Length" 8-bit unsigned integers separated by comma. The hexadecimal values are allowed. Example: "0;+18;255;0xFA" The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 8-bit signed integers of size "Length"
AM_TID_META_INT16	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NUL-terminated ASCII string - textual representation of "Length" 16-bit signed integers separated by comma. Example: "0;+1800;-255;32355" The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 16-bit signed integers of size "Length"
AM_TID_META_UINT16	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NUL-terminated ASCII string - textual representation of "Length" 16-bit unsigned integers separated by comma. The hexadecimal values are allowed. Example: "0;+543;2550;0x12FF" The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 16-bit signed integers of size "Length"
AM_TID_META_INT32	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NUL-terminated ASCII string - textual representation of "Length" 32-bit signed integers separated by comma. Example: "0;+67;-235987;32355" The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 32-bit signed integers of size "Length"
AM_TID_META_UINT32	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NUL-terminated ASCII string - textual representation of "Length" 32-bit unsigned integers separated by comma. The hexadecimal values are allowed. Example: "0;+543;12362550;0x56FDE345" The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 32-bit signed integers of size "Length"
AM_TID_META_INT64	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NUL-terminated string - textual representation of "Length" 64-bit signed integers separated by comma. The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 32-bit signed integers of size "Length"
AM_TID_META_UINT64	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NUL-terminated ASCII string - textual representation of "Length" 64-bit unsigned integers separated by comma. The hexadecimal values are allowed. The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 32-bit signed integers of size "Length"
AM_TID_META_BOOL	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NULL-terminated string - textual representation of "Length" Boolean values separated by comma. Example: "TRUE;FALSE;false;true" The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 32-bit unsigned integers of size "Length" The value 1 represents boolean TRUE and the value 0 represents boolean FALSE.
AM_TID_META_RATIONAL_INT32	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NUL-terminated ASCII string - textual representation of "Length" rational values separated by comma. Each rational value is fraction where both numerator and denominator are 32-bit signed integers separated by slash. Zero is allowed. Example: "+324/-567;0/0;-68/45668" The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 32-bit signed integers of size 2 * "Length" Each two elements represent pair (numerator, denominator) that represents rational number numerator/denominator.
AM_TID_META_RATIONAL_UNT32	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NUL-terminated ASCII string - textual representation of "Length" rational values separated by comma. Each rational value is fraction where both numerator and denominator are 32-bit unsigned integers separated by slash. Zero is allowed. Example: "+324/567;0/0" The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 32-bit unsigned integers of size 2 * "Length" Each two elements represent pair (numerator, denominator) that represents rational number numerator/denominator.
AM_TID_META_FLOAT	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NUL-terminated ASCII string - textual representation of "Length" 4-byte float-point values separated by comma. Example: "-298.98676;3568732;6.9876E-10;0" The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 4-byte float-point values of size "Length"
AM_TID_META_DOUBLE	The "FLTR.METADATA_FORMAT" global parameter value is "text": Value is pointer to NUL-terminated ASCII string - textual representation of "Length" 8-byte (double precision) float-point values separated by comma. Example: "-29842.9867698098;356873245345;6.98766575489E+50;0" The "FLTR.METADATA_FORMAT" global parameter value is "binary" (DLL only): Value is pointer to array of 8-byte (double precision) float-point values of size "Length"
AM_TID_META_STRING	It does not depend on "FLTR.METADATA_FORMAT" global parameter value Value is pointer to NUL-terminated ASCII string, "Length" - length of the string (NULL is not counted). Example: "Simple string"
AM_TID_RAW_DATA	It does not depend on "FLTR.METADATA_FORMAT" global parameter value Value is pointer to byte array that represent binary data, "Length" - size of the array in bytes.