[luatex] a question about the names \Umathcharnumdef etc

[Joseph Wright]

On 16/10/2015 09:04, Ulrike Fischer wrote:
> Are all these \Umath etc primitives using the same syntax in both
> engines? 


All of the \U... primitives which are defined by XeTeX have the same
syntax as those in LuaTeX. Note though that XeTeX uses far fewer of
these (and does others using \fontdimen data).

Joseph