Aloha all,

It is very convenient in org-babel to open a new buffer on a source  
code block with C-c ' and edit in that buffer using the appropriate  
Emacs major/minor modes.

Currently, the LaTeX source code buffer doesn't have access to labels  
defined in other source code blocks.  Outside of org-babel, when  
editing multi-file documents, reftex (or auctex, I'm not sure which)  
scans all the files referenced in the master file for labels and makes  
these available when adding a cross reference.

It would be nice if C-c ' on a LaTeX source code block did something  
similar, perhaps by finding LaTeX source code blocks with a :tangle  
header argument and evaluating the noweb references to find label  
definitions.

If it is the case that the Org-mode file contains more than one LaTeX  
source code block with a :tangle header argument, then perhaps the  
user could be given a choice of which one to search for label  
definitions.

There are easy workarounds for this, so it isn't a big deal.  It would  
be deluxe to leverage the full power of reftex while editing org-babel  
LaTeX source code blocks, though.

All the best,
Tom

Thomas S. Dye, Ph.D.
T. S. Dye & Colleagues, Archaeologists, Inc.
Phone: (808) 529-0866 Fax: (808) 529-0884
http://www.tsdye.com