Failure to copy attributes when changing element type

In the TEI text

	blah blah <phr ana="VPP">something</phr> blah blah

If I use C-= to change phr to cl (valid), it says it cannot match
the attribute ana. Both phr and cl have the same attribute list:
ana is declared as IDREF in both, and the value VPP exists as an 
ID in the document

I thought it used to do this OK last time I used it.

I'm using psgml which says

;;; Compiled by [email protected] on Sat Jan 25 01:31:03 2003
;;; from file /usr/src/build/208946-noarch/BUILD/psgml-1.2.3/psgml.el
;;; in Emacs version 21.2.1
;;; with bytecomp version 2.85
;;; with all optimizations.

and I'm also using xxml-mode:

;;; Supplementary tools for handling SGML and HTML.
;;; Copyright © 1999, 2000 Progiciels Bourbeau-Pinard inc.
;;; François Pinard <[email protected]>, 1999.
;; This code has been debugged using Emacs 20.3.11 and PSGML 1.1.5.
(defconst xxml-version "1999-08-04 18:30")

Does anyone know what might cause this? My elisp isn't good enough
to work it out.

///Peter




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