Two amsrefs bibliographies, with different label styles

Question

How can I convince amsrefs to use in one biblist the alphabetic style and in another biblist the numeric style?

Answer 1

For what it's worth, I managed to do this by saying

\makeatletter
\let\alpha@label\relax
\makeatother

right before the second biblist.

Later: Changing other of the formatting options would be nice, too, by the way. For example, the second biblist should use only initials, and that is more annoying to do: one has to copy all of this code:

\BibSpec{nameLE}{
  +{}{}{initials}
  +{}{\IfEmptyBibField{initials}{}{ }}{surname}
    +{}{ }{jr}
}
\BibSpec{nameBE}{
    +{}{}{surname}
    +{}{ }{initials}
}
\BibSpec{nameinverted}{
    +{} {}  {surname}
    +{,}{ } {initials}
    +{,}{ } {jr}
}

and using the nobysame option amounts to saying

\let\save@primary\@empty

Answer 2

As of version 2.12 of 2013/01/15, amsrefs.sty's biblist environment takes an optional argument allowing to change the label style locally, so this is now the canonical solution.