Hyphenation Markup

[Otto Stolz via Unicode]

Am 2018-06-02 um 06:44 schrieb Richard Wordingham via Unicode:
> In Latin text, one can indicate permissible line break opportunities
> between grapheme clusters by inserting U+00AD SOFT HYPHEN.  What
> low-end schemes, if any, exist for such mark-up within grapheme
> clusters?

What about U+200B ZWSP?

>  this character is intended for invisible word
> separation and for line break control; it has no
> width, but its presence between two characters
> does not prevent increased letter spacing in
> justification

Best wishes,
   Otto Stolz