Extract subscripts / superscripts

[malinphy]

PyPDF loader is a great tool. However, I am having a problem extracting the chemical formulas with subscripts. For example
H₂O is extracted as \nHO \2. Is there any way to fix this issue? (Maybe with visitor functions) Thanks in advance.
Best regards

[pubpub-zz]

PDF is a electronic printing format where "glyphs" are printed at defined positions with defined size. subscripts are not always printed in the good order. You can try with visitors, but it may be tricky.

[malinphy]

PDF is a electronic printing format where "glyphs" are printed at defined positions with defined size. subscripts are not always printed in the good order. You can try with visitors, but it may be tricky.

Thanks for the advice. Do you have any idea what should be changed, which parameters should be tricked?

[pubpub-zz]

no ideas...😞

[MartinThoma]

I'm closing this issue, because I don't know how we could tackle this. It's a good question and a desirable result, but I don't see this happening in the next years. I've added it to #1181 just in case somebody has an idea.