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Documents
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<h2>Modelica Language Documents - Version 3.5 - February 2021<br /></h2>
<p> </p>
<p>Modelica is a free object-oriented modeling language with a textual
definition to describe physical systems in a convenient way by
differential, algebraic and discrete equations. A Modelica modeling
environment is needed to edit or to browse a Modelica model graphically
in form of a composition diagram (= schematic). A Modelica translator
is needed to transform a Modelica model into a form (usually C-code)
which can be simulated by standard tools <a title="Tools" href="tools.html">(see the tools page)</a>. The following documents describe the Modelica language:</p>
<ul>
<li>The <a href="documents/MLS.pdf" target="_blank"><strong>Modelica Specification,
version 3.5</strong> (PDF format)</a> and also externally as <a href="https://specification.modelica.org/maint/3.5/MLS.pdf" target="_blank">PDF</a> and as <a href="https://specification.modelica.org/maint/3.5/MLS.html" target="_blank">HTML</a>
is the official definition of the Modelica language
and includes the grammar, the semantic specification and a definition of the
built-in operators.
</li>
<li>
The development process of the Modelica specification is carried out on <a class="external-link" href="https://github.com/modelica/ModelicaSpecification">GitHub</a>. To report issues with the language specification, please check on the <a class="external-link" href="https://github.com/modelica/ModelicaSpecification/issues">GitHub issue tracker</a> if something similar has already reported. If not, please open a new issue yourself.
</li>
<li>An overview article about the Modelica language, Modelica libraries,
Modelica tools and the Modelica Association is available <a href="documents/ModelicaOverview14.pdf" target="_blank">here (PDF
format, 160 Kbyte)</a>. This version still refers to Modelica version
1.4, but works well as an introductory text.<br />
</li>
<h4>Modelica documents from other sources:</h4>
<li> References to introductory books of Modelica as well as
numerous publications with regards to different aspects of the language,
of Modelica libraries, of the transformation algorithms of Modelica translators,
and of Modelica applications are available from the
<a title="Publications" href="publications.html">publications page</a>.<br /><br /> </li></ul>
<h2>Modelica Language Documents - Previous Versions</h2>
<p> </p>
<h3>Modelica Language Documents - Version 3.4 - April 2017</h3>
<ul>
<li><strong></strong>The <a href="documents/ModelicaSpec34.pdf" target="_blank"><strong>Modelica Specification,
version 3.4</strong> (PDF format)</a> is the official definition of the Modelica language
and includes the grammar, the semantic specification and a definition of the
built-in operators. The same document with revision marks with respect to version 3.3 Revision 1
(<a title="Modelica Specification, version 3.4, with revision marks" href="documents/ModelicaSpec34_withRevisionMarks.pdf">PDF format</a>).<br />
</li>