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OSX 10.14 Mojave - man page for mdls (mojave section 1)

MDLS(1) 						    BSD General Commands Manual 						   MDLS(1)

mdls -- lists the metadata attributes for the specified file
mdls [-name attributeName] [-raw [-nullMarker markerString]] file ...
The mdls command prints the values of all the metadata attributes associated with the files provided as an argument. The following options are available: -name Print only the matching metadata attribute value. Can be used multiple times. -raw Print raw attribute data in the order that was requested. Fields will be separated with a ASCII NUL character, suitable for piping to xargs(1) -0. -nullMarker Sets a marker string to be used when a requested attribute is null. Only used in -raw mode. Default is "(null)".
mdfind(1), mdutil(1) xargs(1) Mac OS X June 3, 2004 Mac OS X