format

image format like "jpg" or "png"

JSON-LD

Linked data represented in JSON https://json-ld.org

mixed content

An HTTPS page that includes content fetched using cleartext HTT

prefix

URL path

quality

default, gray, bitonal, color

query parameter

the part of a URL after the question mark

region

requested region of image

scheme

http or https part of the URL

size

requested image size

URL encoded

aka percent encoding https://en.wikipedia.org/wiki/Percent-encoding