| http://www.w3.org/ns/prov#value | - For PDF's it will return data about the PDF.(optional: defaults to false)get_exifBlitline will return all the metadata associated with an image, including EXIF on the original, and info such as filesize, density, depth, and quality on each saved image.(optional: defaults to false)passthrough_metadataBlitline will return any data
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