Need for robust 13F and N-PX historical parsing

[jacob187]

I've explored historical 13F and N-PX filings and found consistent patterns of inconsistency across these documents. This aligns with the issue raised in #476. I'm wondering if it would be worth building a robust module to handle edge cases across both filings, possibly beyond these two as well. I've noticed development is underway for 8-K parsing, but nothing is fully implemented yet. Do you think this approach is viable, and a good direction to take this project?

[dgunning]

There is an NPX pull request which should address issues with those filings. We should review it to see how well it adds robustness

For 13F there is still an issue with older filings where the formats vary so much that it was hard constantly parse the fillings. The first step would probably be to understand the formats. Add your analysis to #476 and let's work on making the parser more solid

[jacob187]

The N-PX parser in my pull request only handles the current specifications, the two dual XML filings.