Many documents today are made available in a PDF format. To work systematically and comprehensively with the contents of these documents requires conversion into the XML format and possibly, intellectual post-processing.
Project examples "converting"
A scientific reference work only available in print was processed electronically, so that the information in it is now searchable and usable in a multitude of ways. A special challenge was posed by diagrams in different depths of detail (similar to a map at different scales), in which data was deposited visibly or invisibly.