application/json
application/xml
colour/rgb
colour/terminal
element/part
element/property
image/gif
image/jpeg
image/png
logicvalue/boolean
meta/channel
meta/encoding
meta/format
meta/language
meta/model
meta/name
meta/type
number/byte
number/complex-cartesian
number/complex-polar
number/fraction-decimal
number/fraction-vulgar
number/integer
text/ascii
text/cybol-path
text/html
text/json
text/plain
text/xml
video/mp4