DFDL

Data Format Description Language (DFDL) is an open standard for describing data formats used in binary and text files and data streams. DFDL is used to describe the format of existing data so that it can be parsed or unparsed (generated) using a DFDL processor, enabling integration with legacy and modern data systems. DFDL was developed by the Open Grid Forum (OGF) and is also published as ISO/IEC 23415:2004. Apache Daffodil is the reference open-source implementation, with the latest release being version 4.1.0.