Standards always come with a lot of information and it is sometimes not easy to find the right information. FIXdom would like to help by providing a few direct links related to FIX and ISO standards that are likely to remain stable.

FIX Online Specification

Landing page for the FIX Application Layer with FIX Latest, Code Lists, UDFs, and more

FIX Extension Packs

List of individual FIX Extension Packs published for FIX Latest

FIX Family of Standards

Landing page for FIX Technical Standards related to encodings and the FIX Session Layer.


“Golden Source” of FIX messages, components, fields and values with extensive search capabilities.

FIX Orchestra

FIX Technical Standard for meta-data information of FIX and non-FIX interfaces (repository, workflows, scenarios) .

ESMA Library

The ESMA Library contains all ESMA documents (use search and filter options to find specific documents, e.g. “XML Schemas”).

ISO 10383 (MIC)

Market Identifier Code – Universal method of identifying exchanges, trading platforms, regulated or non-regulated markets and trade reporting facilities.

ISO 17442 (LEI)

Legal Entity Identifier – Unique and unambiguous identification of
participants in financial transactions (maintained by GLEIF).

ISO 10962 (CFI code)

Classification of Financial Instruments – Definition and description of codes for an internationally valid system to classify financial instruments (2019 version).