This information is part of the Modelica Standard Library maintained by the Modelica Association.
Several changes are planned for version 3.1 of Modelica.Media. In order to have an easy transition, the current version is moved to the ObsoleteModelica-package and current users can continue to use it for many years. The goal for the new version is to cover many more fluids, be easier to use for users and less for implementers that want to include their own models. A beta-version of the new media library will be available in the first quarter of 2009.
The main user-visible changes are:
For further information on the upcoming version, please contact the Author
In order to simplify transition to the upcoming version of Modelica.Media for Modelica 3.1, a new enumeration has been introduced: IndependentVariables with the entries ph, pT, pTX, phX and dTX. Users are advised to use this enumeration to determine the independent variables of a medium. If they are going to use the function based interface of the current Modelica.Media (and not use the BaseProperties from Modelica.Media), they should not have any trouble using the next version without any need for changes in their code.