Variable: bibtex-field-name
bibtex-field-name is a variable defined in bibtex.el.gz.
Value
"[^\"#%'(),={} \n0-9][^\"#%'(),={} \n]*"
Documentation
Regexp matching the name of a BibTeX field.
Source Code
;; Defined in /usr/src/emacs/lisp/textmodes/bibtex.el.gz
(defconst bibtex-field-name "[^\"#%'(),={} \t\n0-9][^\"#%'(),={} \t\n]*"
"Regexp matching the name of a BibTeX field.")