[XeTeX] pdftex staements no longer work.

[Joseph Wright]

John Culleton wrote:
> The following pdftex statements won't work in xetex:
> \pdfhsize
> \pdfvsize
> 
> ...and probably a fistful of others.  
> Is there a list somewhere of the missing commands?
> 
> What are the xetex equivalents of those two above?
> (not latex, plain xetex please). 

XeTeX does not implement everything in pdfTeX as XeTeX is derived from
tex.web + etex.ch, not pdftex.web. In general, commands starting \pdf...
might not be available, or might have different names. For example, the
LaTeX3 team recently asked for \pdfstrcmp to be added to XeTeX as it is
very useful. In XeTeX, it is just called \strcmp. (There are a few
\pdf... primitives in XeTeX, but this is the exception not the rule.)
-- 
Joseph Wright