fontspec manual mentions a feaure called mapping. However, it does not really document lots about it:
Mapping enables a XeTeX text-mapping scheme, shown in Example 40.
tex-textmapping is also equivalent to writing
Ligatures=TeX. The use of the latter syntax is recommended for better compatibility with LuaTeX documents.
I have also seen a number of questions around here that talk about using the feature:
- How to insert Greek with "ascii keyboard" and XeTeX, Polyglossia
- Greek circumflex accent with ascii characters using mapping does not work
- Mapping ‘space + character’ into ‘non-breaking space + character’
- How to keep both Mapping=arabicdigits and Ligatures=TeX in this MWE?
- Using XeTeX for automatic transliteration of cyrillic letters
But the contents are usually just ‘use this in this way. Profit.’
The basic gist I get is that I need to prepare a text file including a set of mapping rules, run it through the compiling command, put it where XeTeX can find it and then include the command
mapping=myMap when selecting a font. I have a feeling that I could use that to implement German blackletter s typesetting rules (when to typeset a plaintext
s as s and when as ſ). I would like to learn more about what I need to take care of when putting together a
Does a ‘tutorial’ of some kind exist online that I could be pointed to?
Or, in the absence of one:
- What can mapping do, what can it not do?
- At which point in document processing is mapping applied?
- Are there any pitfalls I want to avoid?