External Data Representation
From Free net encyclopedia
eXternal Data Representation (XDR) is an IETF standard of the presentation layer in the OSI model. XDR allows data to be wrapped in an architecture independent manner so data can be transferred between heterogenous computer systems. Converting from the local representation to XDR is called encoding. Converting from XDR to the local representation is called decoding. XDR is implemented as a software library of functions that is portable between different operating systems and is also independent of the transport layer.
The XDR data format is in use by:
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XDR data types
XDR defines the following data types:
- boolean
- int (32 bit integer)
- hyper (64 bit integer)
- float
- double
- enumeration
- structure
- string
- fixed length array
- variable length array
- union
- opaque data
See also SDXF.
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