The aim of PDF2RDF (Portable Document Format(PDF) to Resource Description Format(RDF)) project is to allow semantic annotation of text, tables, and/or figures contained in static PDF based research publications automatically. As PDFs lack semantic annotation and structuring, and have a unique encoding format, so it is difficult to execute complex query to PDF documents directly and efficiently - but once the information is extracted and annotated in RDF, complex queries may be easily and effectively executed.
malikalamgirian/PDF2RDF
Converts Springer LNCS formatted PDFs to RDFs using text processing techniques.
JavaMIT