Not sure if vector-based importing or referencing is being actively developed or due soon... but it would be useful to have a function to vectorise the annotation elements like text and dimensions in the mean time.
Currently, vector format pdfs are converted into raster on import. it would be good to be able to convert the annotation elements to Mstn text and dims for editing and searching purposes.
Maybe the user could use a fence to limit the conversion to certain areas? I think that Descartes has long had some OCR functionality?