Basic question about scalar types and libyaml

I'm investigating the feasibility of moving the input format
for a large scientific code to some standard XML-like format,
and found YAML/JSON to be very appealing possibilities.  I'm
playing around with libyaml and have a very basic question
about scalar types.  The wikipedia page on YAML (perhaps my
first mistake) describes autodetection of simple types (int,
float, bool, string) as a compelling feature, yet it appears
to me that libyaml returns all data as strings.  I thought
I could work around that by looking at the tag attribute but
that turns out to be null, unless I explicitly give a tag
in the input file.  So it appears that libyaml isn't doing
any autodetection of type at all.  Have I missed something?
It seems that I would need to write things like
[ !!float 1.0, !!float 1.0e3 ] instead of the more natural
[ 1.0, 1.0e3 ].

Thanks for your advice,
  Neil
-- 
Neil Carlson
Computational Physics and Methods (CCS-2)
Los Alamos National Laboratory
PO Box 1663, MS D413 · Los Alamos, NM 87545
505.665.6386 · 505.665.4972 (fax)


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