<http://schema.org/keywords>
"quality print, print size, pixels available, print, pixels, pixels per inch, image size, inch, inch of a print, pixels by y pixels, quality, size, available, pixels in your image, image"^^<http://www.w3.org/2001/XMLSchema#string>
<https://imagescience.com.au/knowledge/the-difference-between-ppi-and-dpi>