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We are pleased to announce the release of version 2.2 and 2.3-beta of
Antimony, the modular, human-readable, human-writeable model definition
language at:

http://antimony.sourceforge.net/

where you can download the Windows installer, source code, and
documentation.

Both new versions of Antimony now support:
* Units
* Deletions
* Submodel time and extent conversion factors
* Individual variable conversion factors

Version 2.3-beta will additionally convert those concepts into
Hierarchical Model Composition package constructs. Version 2.3 is a beta
release solely because the Hierarchical Model Composition package has not
yet been approved; since one of the requirements for package approval is
having working implementations, it is hoped that this release of Antimony
will further that goal.

The documentation has not yet been updated to reflect the new
capabilities, but in brief, the syntax for the new constructs is:

Units:
unit mL = 1e-3 moles/liter;
x = 27 mL;
y = 23 mL + x;
y has mL;

Deletions:
delete S1.x

Submodel time and extent conversion factors:
S1: submodel1(), timeconv=60, extentconv=1000;
S2: submodel2(), timeconv=tc, extentconv=xc;
tc=3600;
xc=10e-3;

Individual conversion factors:
S1.y * cf1 is Y;
S1.z is Z/cf1;

Any questions, feel free to contact me (lpsmith@uw.edu) or one of lists
cc'ed in this message. We would like to thank the NIH for their support,
both for Dr. Herbert Sauro, whose lab this work started in, and Dr.
Michael Hucka, whose lab this work has most recently been supported by.

Thank you!

-Lucian Smith
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