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External Data Representation
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== XDR data types == * [[Boolean data type|boolean]] * int β 32-bit [[Integer (computer science)|integer]] * unsigned int β unsigned 32-bit [[Integer (computer science)|integer]] * hyper β 64-bit [[Integer (computer science)|integer]] * unsigned hyper β unsigned 64-bit [[Integer (computer science)|integer]] * [[IEEE 754|IEEE]] [[floating point|float]] * IEEE [[double precision|double]] * [[quadruple precision|quadruple]] (new in RFC1832) * [[Enumerated type|enumeration]] * [[Record (computer science)|structure]] * [[string (computer science)|string]] * fixed length [[Array data structure|array]] * variable length [[Array data structure|array]] * [[Tagged union|union]] β discriminated union * fixed length [[Opaque data type|opaque]] data * variable length [[Opaque data type|opaque]] data * [[Void type|void]] β zero byte quantity * optional β optional data is notated similarly to C pointers, but is represented as the data type "pointed to" with a Boolean "present or not" flag. Semantically this is [[option type]].
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