PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In my brief experience with the device, I have noticed some trends in what causes hard read barcodes: highly-glossy reflective surfaces, intervening plastic covers, left-over glue from stickers placed over the barcode (a frustratingly common practice!), and of course barcodes printed in odd colors, particularly reds and pinks.
http://www.w3.org/ns/prov#wasQuotedFrom
  • freesoftwaremagazine.com