reftex-add-to-label-alist

reftex-add-to-label-alist is an alias for `reftex-add-label-environments' in `reftex.el'.

(reftex-add-to-label-alist ENTRY-LIST)

Add label environment descriptions to `reftex-label-alist-style'.
The format of ENTRY-LIST is exactly like `reftex-label-alist'. See there
for details.
This function makes it possible to support RefTeX from AUCTeX style files.
The entries in ENTRY-LIST will be processed after the user settings in
`reftex-label-alist', and before the defaults (specified in
`reftex-default-label-alist-entries'). Any changes made to
`reftex-label-alist-style' will raise a flag to the effect that
the label information is recompiled on next use.