DFDL4S is a generic binary data binding library (Java and C++)  based on the Data Format Description Language (DFDL).

The library interface enables a set of data manipulation operations making use of DFDL schema files to Read and Write binary data (e.g. CCSDS Space Packets).

DFDL4S is provided as Java and C++ library and it is available for several platforms (Windows, Linux and Mac OS X)

Documentation is located here. Online API documentation is available for Java and C++.



Version 1.7.0 : [Spring 2021]

  • further improvements to DFDL standard support
    • replacement of regular expressions with dfdl:defineVariable + XPath 2.0 approach to specify paths
  • extend API to handle time values following CCSDS Time Code Formats
  • extend API to allow reporting CRC/RS errors 
  • extend API to verify Checksum and apply Reed-Solomon Error Correction

Version 1.8.0 : [Autumn 2021]

  • Align callback interface between Java and C++ APIs



For technical support, please contact the DFDL4S helpdesk at This email address is being protected from spambots. You need JavaScript enabled to view it.


Known Issues

Status Summary
 0056 ASSIGNED  Progress monitor not supported in C++ API








Additional information