[XeTeX] Absence of ligatures

[Philip Taylor (Webmaster, Ret'd)]

Khaled Hosny wrote:
> On Wed, Jun 09, 2010 at 07:13:28PM +0100, José Carlos Santos wrote:
>> On 09-06-2010 18:23, Khaled Hosny wrote:
>>
>>>> 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?

>> Thanks for the reply. Can you please tell me how should I set, say,
>> Language=Latin?
>
> The same way you set Liagtures=Common.

As José did not specify "Ligatures=Common" in his original message
(see above), it is highly unlikely that he knows how to
specify "Ligatures=Common" any more than he knows how to
specify "Ligatures=Latin".

Perhaps someone who /does/ know could enlighten us all.

Philip Taylor