Is @dp special?

[Akim Demaille]

I meant to use 

@alias dp = acronym

(For Design Pattern), but tex behaves strangely then:

----------------------------------------
\input texinfo @c -*-texinfo-*-
@setfilename include-example.info
@settitle Include Example

@alias dp = strong

@ifnottex
@node Top
@top Include Example
@end ifnottex

@node Introduction
@unnumbered Introduction

@dp{Bold}.

@bye

----------------------------------------

/tmp % texi2dvi foo.texi                                         nostromo 11:30
This is TeXk, Version 3.14159 (Web2C 7.4.5)
 file:line:error style messages enabled.
(/tmp/foo.texi (./texinfo.tex Loading texinfo [version 2003-08-13.14]: Basics,
pdf, fonts, page headings, tables, conditionals, indexing, sectioning, toc,
environments, defuns, macros, cross references,
(/usr/share/texmf/tex/generic/dvips/epsf.tex) localization,
and turning on texinfo input format.) (./foo.aux) (Introduction)
/tmp/foo.texi:17: Missing number, treated as zero
/tmp/foo.texi:17: Illegal unit of measure (pt inserted)
[1] )
(see the transcript file for additional information)
Output written on foo.dvi (1 page, 336 bytes).
Transcript written on foo.log.
/home/akim/bin/texi2dvi: tex exited with bad status, quitting.
/home/akim/bin/texi2dvi: see foo.log for errors.


Another name than dp is fine.  Is it special?  Should makeinfo have
warned me about the future clash?