[fitsbits] Question on angstrom and erg units in FITS standard

[Thomas Robitaille]

Hello,

As per the FITS standard:

  http://www.aanda.org/articles/aa/pdf/2010/16/aa15362-10.pdf

in Table 4, angstrom and erg are listed as allowed units in the FITS
standard. These are followed by a footnote:

  Deprecated in IAU Style Manual (McNally 1988) but still in use.

My question is, are these units deprecated in the FITS standard too? Or
is this one of the places where the FITS standard deviates from McNally
1988?

In short, should FITS readers/writers treat 'angstrom' and 'erg' as
deprecated?

Thanks,
Tom