Make custom XBRL formula rules and validate custom instance

[Angad]

Hi all,

I have created a custom instance against a custom taxonomy. Now i want to write some XBRL formulas and validate my instance against it. Can you please help me with the procedure to do so using Arelle?

Thank you

Kind Regards,

Angad Khurana

[Austin Matherne]

Hi Angad,

Arelle doesn't have a mechanism for writing XBRL formula linkbases, but if you validate a report in Arelle that loads a taxonomy with formulas it will validate them.

Kind regards,

Austin Matherne

[Angad]

Hi,

Thanks for your quick response. Just a quick question does the taxonomy also need to contain information about the formula linkbase or just the instance need to have an import statement?

Kind Regards,

[Austin Matherne]

Arelle has the ability to import schemas and linkbases (including formula) in addition to the files discovered while parsing the taxonomy.

[Angad]

Hi,

Thanks a lot for your email. Could you elaborate more on this please?

Regards,
Angad 

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[Austin Matherne]

There's an import command line argument `--import <file>` and an import file option under the file menu of the GUI that can be used to load additional schemas and linkbases not directly included in the DTS of a report (if for example you wanted to run your formulas against a filing created by someone else). Adding an additional import in the instance should also work to make Arelle aware of the formulas.

[Angad]

Hi,

Thanks a lot for your response. Its all clear now.

Regards,

Angad Khurana