GEnumValue is a struct of value, name, nick; though difference of name vs. nick
is not really documented in GLib

Our elements seem to do it opposite from what is intended;
look at e.g. videotestsrc:
  static GEnumValue pattern_types[] = {
    {GST_VIDEOTESTSRC_SMPTE, "smpte", "SMPTE 100% color bars"},
    {GST_VIDEOTESTSRC_SNOW, "snow", "Random (television snow)"},
    {GST_VIDEOTESTSRC_BLACK, "black", "100% Black"},
    {0, NULL, NULL},
  };


taking a hint from the mkenums script:
- "nick" should be a short string, all lowercase, using "-"
- "name" would be the longer string, possibly descriptive

example of generated enums:
  static const GEnumValue values[] = {
    { GST_STATE_VOID_PENDING, "GST_STATE_VOID_PENDING", "void-pending" },
    { GST_STATE_NULL, "GST_STATE_NULL", "null" },
    { GST_STATE_READY, "GST_STATE_READY", "ready" },
    { GST_STATE_PAUSED, "GST_STATE_PAUSED", "paused" },
    { GST_STATE_PLAYING, "GST_STATE_PLAYING", "playing" },
    { 0, NULL, NULL }


gst-inspect would show, for enum properties:
[value]) [nick]: [name]

[nick] can then be used in parse_launch syntax (even though names can be used as
well, through some freak accident)