Article · Wikipedia archive · Last revised Jun 10, 2026

MDDL

MDDL is an XML-based messaging format for exchanging information related toFinancial Instruments Corporate events related to the financial instruments Market-related data

Last revised
Jun 10, 2026
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≈ 1 min
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MDDL (Market Data Definition Language) is an XML-based messaging format for exchanging information related to

MDDL was developed by FISD (Financial Information Services Division) of SIIA (Software & Information Industry Association). The initiative for the use of XML in market data exchange was started in 2000 and has been gaining industry-wide acceptance.

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