This part of IEC 61804 specifies the Electronic Device Description Language (EDDL) technology, which enables the integration of real product details using the tools of the engineering life cycle.
ANSI/ISA 61804-3-2007 history
2007ANSI/ISA 61804-3-2007 Function Blocks (FB) for Process Control - Part 3: Electronic Device Description Language (EDDL)