Is there a option to change the seperator for multi-header from dot to underscore ?

[pradyrk]

Question

When a parent header is merged with child header , dot is used as separator like "parentheader.childheader" , is it possible to use underscore or any user-defined separator ?
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[PeterStaar-IBM]

@pradyrk Can you please elaborate what you are referring to: is that with regard to the json serialisation from references?

[pradyrk]

I am extracting tables from PDF using OCR options , the output of the table looks like below

Its a multi-header table , in the output the parent header is merged with child with dot as a separator , ask is is there a way to use different separator other than dot ?