What I have mainly have been looking for in the free software ecosystem is a good tool to work with PDF tagging/structure/element attributes. At work I really

What I have mainly have been looking for in the free software ecosystem is a good tool to work with PDF tagging/structure/element attributes. At work I really have only been able to do the work I need on random PDFs with Adobe Acrobat. It seems strange that this is the case as PDF is now an open standard.