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National Securities Depository Limited
3rd Floor, Naman Chamber,
Plot C-32, G-Block,
Bandra Kurla Complex, Bandra East,
Mumbai , Maharashtra - 400 051
CIN: U74120MH2012PLC230380
SEBI Registration Number - IN-SD-NSDL-01-96

Last Updated: 16 May 2026
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  • ISO Standardization

ISO Standardization

ISO Standardization

As per recommendations of SEBI’s Market Data Advisory Committee (MDAC), the data files generated by market participants in all segments are different and there is a need for these formats to be standardized and harmonized in order to facilitate ease of doing business in Indian Securities market. In view of the above, all the file formats are standardized across depositories. The new standardised file formats are named “Unified Distilled File Formats (UDiFF)”

The new standardized file formats are given below.

Sr. No.File Formats
1ISIN Master
2CC Calendar Export
3Corporate Action Export
4Member Master
5Statement of Transaction
6Statement of Holding
7Common Transaction Upload Format
8ISIN Rate Master
9Common Upload Response Format
10Account Opening / Modification / Closure Format
11DP57 / COD Export
12Client Master Export
13DIS Master
14Account Opening / Modification /Closure Response Format

UDiFF guidance document (62 KB)

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UDiFF catalogue and sample files (33,893 KB)

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File Formats (6.4 MB)

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