Variable: bib-string-regexp
bib-string-regexp is a variable defined in bib-cite.el.
Value
"^[, ]*[a-zA-Z]+[ ]*=[ ]*\\([a-zA-Z][^#%'(),={}\" \n]*\\)"
Documentation
Regular expression for field containing a @string.
Source Code
;; Defined in ~/.emacs.d/elpa/auctex-14.1.2/bib-cite.el
;; Code from bibtex.el ends
;; @string starts with a letter and does not contain any of ""#%'(),={}
;; Here we do not check that the field contains only one string field and
;; nothing else.
(defvar bib-string-regexp
"^[, \t]*[a-zA-Z]+[ \t]*=[ \t]*\\([a-zA-Z][^#%'(),={}\" \t\n]*\\)"
"Regular expression for field containing a @string.")