On 17/02/2010, at 1:00 AM, Joseph Wright wrote: > My understanding was that the "native" encoding, at least for XeTeX, was UTF-8. I'm not aware of any encoding difficulties in XeTeX. For example, one can write \let\a=𝔄 [\a] and receive the log message Missing character: There is no character number "1D504 in font ... IIRC, at one stage XeTeX was restricted to UTF-16 input chars (or at least that \char and friends were restricted to 16 bits), but that changed when JK realised that we needed full UTF-32 support for maths. -- Will