Contextual lookups within contextual lookups examples

[Hermes14]

Greetings,

In another thread

How to view and edit substitution tables

Greetings, Many thanks to the High-Logic team for their many improvements to OTD Preview over the past few weeks. I’m still trying to get the hang of OTD. Consider the attached comparison of a VOLT table and its import in OTD: [substitution-table-VOLT.jpg] [substitution-table-OTD.jpg] Questions: How do we view the entries in the substitution table padj_vwl\RTm? The View field is not available. How do we edit the entries in the substitution table padj_vwl\RTm? The Substitution Table is…

the following came up:

We’ve seen fonts which contain contextual lookups which refer to contextual lookups. This is not possible within VOLT for example.

Asked around, someone mentioned this font: Noto Nastaliq Urdu

Noto Nastaliq Urdu test page

Noto Home - Google Fonts

Sure enough, it contains contextual lookups which refer to contextual lookups.

Can anyone point to other examples? What Latin fonts, if any, use this method?

[BTW: This font is problematic. Notes for discussion/support at some future point: i) Preview has difficulties rendering certain GSUB’s; ii) mark, mkmk tables are worthless for practical applications involving vowels; etc.]

[ErwinDenissen]

I know I have one or two but I can’t find them right now