Introduction:
Complex information systems require a data dictionary in order to facilitate data entry, facilitate interoperability of systems, and facilitate analysis of comparable data across institutions and venues.
A health-sector-wideNational Health Data Dictionary [NHDD] is a dynamic document which spells out in detail each coding system, and each data item – both its format and its meaning (semantics).
The NHDD will be in Mongolian and English, and will be web-enabled, to allow easy updates and allow easy access to “the latest version” by each stakeholder.



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