Missing ISIN/CUSIP/SEDOL from ld.get_data even though identifiers appear in Workspace (example: VSSL

Hi,

I’m using the LSEG Data Library for Python to retrieve instrument identifiers (ISIN, CUSIP, SEDOL, etc.) from RICs as part of a global equity mapping pipeline. For most instruments, this works well. However, for a subset of equities the API does not return all identifiers, even though they are clearly visible in Refinitiv Workspace.

import lseg.data as ld

ld.open_session()

ld.get_data('VSSL.BO',['TR.RIC', 'TR.ISIN', 'TR.CUSIP', 'TR.SEDOL', 'TR.InstrumentType'])

Issue:
The output does not include TR.CUSIP for this RIC.
But when I check the same instrument in Refinitiv Workspace, the CUSIP is available under the instrument’s identifiers.

This behavior is not limited to one RIC — I am working with a large universe of global equities, and the identifier completeness is crucial for my downstream mapping and reconciliation workflows.

Why would ld.get_data() omit certain identifiers (e.g., CUSIP) even though they appear in Workspace for the same RIC?
Is there an alternative or recommended method to reliably retrieve all identifiers for global equities via the Python API?

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Accepted answers

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Jirapongse

@Baruch

Thank you for reaching out to us.

I think the Y73033105 is CINS which stands for CUSIP International Numbering System, is a nine-character code used to identify securities issued outside of the United States and Canada.

The fields that can provide CINS are TR.CinCUSIPCode and TR.CUSIPExtended. The code is:

ld.get_data('VSSL.BO',['TR.RIC', 'TR.ISIN', 'TR.CUSIP', 'TR.SEDOL', 'TR.InstrumentType', 'TR.CinCUSIPCode','TR.CUSIPExtended'])

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