SOX / XDR Native Datatype Comparison
SOX Datatype	Description	XDR Datatype	Description	Comments
boolean	Binary "true" or "false"	boolean	An integer, value 0 or 1	Cannot reconcile the two. XDR version will have to be an enumeration with a choice of "true" or "false".
string	Unlimited length text string	string	PCDATA
URI	Universal Resource Identifier	uri	Uniform Resource Identifier
number	Infinite precision, signed number with up to one decimal point.	number	Number with unlimited digits, can be signed and contain a decimal place.
float	Single precision float in the range -3.40282347*10E38 to 3.40282347*10E38	r4	Four-byte encoded floating point value, approx. Min = 1.17549435E-38F, approx. Max = 3.40282347E+38F	Appear to be identical, despite discrepancy in the descriptions.
double	Double precision float in the range -1.17549435*10E308 to 1.17549435*10E308	r8	Eight-byte encoded floating point value, approx. Min = 2.22507386E-308, approx. Max = 1.797693135E+308	Appear to be identical.
int	An integer in the range -2,147,483,648 to 2,147,483,647.	i4	Four-byte integer with optional sign. In range: -2147483648 to 2147483647.
long	An integer in the range -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.	i8	Eight-byte integer with optional sign. In range: -9223372036854775808 to 9223372036854775807.
byte	An integer in the range -128 to 127	i1	One-byte integerwith optional sign. In range: -128 to 127.
ID	Unique identifier.	id	Unique Identifier.	XML1.0 - ID
IDREF	Used to refer to an ID object.	idref	Contains a value corresponding to an id.	XML1.0 - IDREF
IDREFS	One or more IDREF values separated by white space.	idrefs	Similar to idref, except with multiple id type values separated by white space.	XML1.0 - IDREFS
NMTOKEN	Text string of limited set of characters.	nmtoken	Contains values that conform to the name token.	XML1.0 - NMTOKEN
NMTOKENS	One or more NMTOKEN values separated by white space.	nmtokens	Similar to idref, except with multiple nmtoken type values separated by white space.	XML1.0 - NMTOKENS
date	Date in format YYYTMMDD	date	Specifies a date in format YYYY-MM-DD	Cannot reconcile. Both take slightly different forms of the ISO 8601 recommendation. Will make it a string for XDR schema.
time	Time in format HH:MM:SS(±HH:MM)	time.tz	Specifies a time in format  HH:MM:SS with optional time zone.	Appear to be the same.
datetime	Combined date and time. Formats are as above, but sepatated by a 'T'. YYYYMMDDTHH:MM:SS(±HH:MM)	dateTime.tz	Specifies date in format YYYY-MM-DDTHH:MM:SS with optional time zone.	Again, because of date differences, cannot reconcile the two. Will use a string.