[XeTeX] Absence of ligatures

[Pander]

Khaled Hosny wrote:
> On Wed, Jun 09, 2010 at 04:45:27PM +0100, José Carlos Santos wrote:
>> Hi all:
>>
>> I have been working on a text whose main font is DTL Unico:
>>
>> http://www.dutchtypelibrary.nl/Unico_rdrct.html
>>
>> I have just noticed that the "fi" and "fl" ligatures are not
>> created. To be more precise: if I compile this document:
>>
>> \documentclass{article}
>> \pagestyle{empty}
>> \usepackage{xltxtra}
>> \begin{document}
>> \Huge
>> \fontspec{DTLUnicoST}
>> fi fl
>> \end{document}
>>
>> I don't get the ligatures that I should get. Am I doing something
>> wrong? Or could it be a flaw within the fonts that I am using?
> 
> Either the font lacks proper OpenType layout code, or you need to
> explicitly select certain OpenType script/language, you can try setting
> Language=Latin, Language=Default, Script=Latin or any combination of
> them and if it works.
> 

\fontspec{DTLUnicoST}\addfontfeatures{Ligatures={Common,Rare}}