MRL

[1] VLC command-line help - VideoLAN Wiki (10/10/2017, 10:17:15 AM) <https://wiki.videolan.org/VLC_command-line_help/>

Stream MRL syntax:
[[access][/demux]://]URL[#[title][:chapter][-[title][:chapter]]]
[:option=value ...]
Many of the global --options can also be used as MRL specific :options.
Multiple :option=value pairs can be specified.

[2] Media resource locator - VideoLAN Wiki (10/10/2017, 10:50:29 AM) <https://wiki.videolan.org/Media_resource_locator/>

A media resource locator (MRL) is a string of characters used to identify a multimedia resource or part of a multimedia resource.