Compatibility between 5.3 and 4.9

[dfauser]

I have to communicate with two different firms, one uses version 5.3 and the other 4.9. In order to simplify the message processing I would like to use only one version of FPML but I don’t really know if this is possible. Will be version 5.3 understandable for the firm that uses version 4.9? Thanks in advanced.

[iyermakova]

Hello In FpML, only a minor FpML version is a version that is intended to be fully backward compatible on the instance level within the current major version (e.g. FpML 4.7, 4.8, 4.9 within FpML 4). A major FpML version (e.g. FpML 4, FpML 5) is a complete re-release of the standard. FpML 5 introduces a new messaging model which dramatically modifies the document structure so the translation between 4.x and 5.x may be extremely difficult. Regards, Irina Yermakova

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