Package Modelica.​UsersGuide.​Conventions


A Modelica main package should be compliant with the UsersGuide stated in this documentation:

  1. Conventions of the Modelica code
  2. Consistent HTML documentation UsersGuide
  3. Structure to be provided by a main package
  4. These packages should appear in the listed order.

Extends from Modelica.​Icons.​Information (Icon for general information packages).

Package Contents

DocumentationHTML documentation
IconsIcon design
ModelicaCodeModelica code
TermsTerms and spelling
UsersGuideUser's Guide

Class Modelica.​UsersGuide.​Conventions.​Icons
Icon design


The icon of a Modelica class shall consider the following guidelines:

Color and Shapes

The main icon color of a component shall be the same for all components of one library. White fill areas of an icon shall not be used to hide parts of an icon, see #2031. In the Modelica Standard Library the following color schemes apply:

Package Color RGB code Color sample
Modelica.Blocks {0,0,127}
Modelica.ComplexBlocks {85,170,255}
Modelica.StateGraph {0,0,0}
Modelica.Electrical.Analog {0,0,255}
Modelica.Electrical.Digital {128,0,128}
Modelica.Electrical.Machines {0,0,255}
Modelica.Electrical.MultiPhase {0,0,255}
Modelica.Electrical.QuasiStationary {85,170,255}
Modelica.Electrical.Spice3 {170,85,255}
Modelica.Magnetic.FluxTubes {255,127,0}
Modelica.Magnetic.FundamentalWave {255,127,0}
Modelica.Magnetic.QuasiStatic {255,170,85}
Modelica.Mechanics.MultiBody {192,192,192}
Modelica.Mechanics.Rotational {95,95,95}
Modelica.Mechanics.Translational {0,127,0}
Modelica.Fluid {0,127,255}
Modelica.Media none
Modelica.Thermal.FluidHeatFlow {0,0,255}
Modelica.Thermal.HeatTransfer {191,0,0}
Modelica.Math none
Modelica.ComplexMath none
Modelica.Utilities none
Modelica.Constants none
Modelica.Icons none
Modelica.SIunits none

Icon size

The icon of a Modelica class shall not be significantly greater or smaller than the default Diagram limits of 200 units x 200 units. These default diagram limits are

If possible, the icon shall be designed such way, that the icon name %name and the most significant parameter can be displayed within the vertical Diagram range of the icon.

(a) (b)
Fig. 1: (a) Typical icon, (b) including dimensions

Component Name

The component name %name shall be in RGB (0,0,255) blue color.

The text shall be located above the actual icon. If there is enough space, the upper text limit of the component name shall be 10 units below the upper icon boundary, see Fig. 1.

If the icon is as big as the entire icon range of 200 units x 200 units, e.g. in blocks, the component name shall be placed above the icon with vertical 10 units of space between icon and lower text box, see Fig. 2.

Fig. 2: Block component name

If there is a connector located at the top icon boundary and it is obvious that this connector influences the model behavior compared to a similar model without such connector, then a line from the connector to the actual icon shall be avoided to keep the design straight, see Fig. 4. If it is required to use a line indicating the connector dependency, then the line shall be interrupted such that this line does not interfere with component name.

Fig. 3: Component name between actual icon and connector

In some cases, if there is not alternative, the component name has to be placed below the actual icon, see. Fig. 4.

Fig. 4: Component name below actual icon

Parameter Name

One significant parameter shall be placed below the icon, see Fig. 1 and 2. The parameter name shall be RGB (0,0,0) black color.

The parameter text box shall be placed 10 units below the actual icon.

Connector location

Physical connectors shall always be located on the icon boundary. Input and output connector shall be placed outside the icon, see Fig. 2 and 3. Preferred connector locations are:

Fig. 5: Connectors located at the four corners of the icon diagram

Diagram icons

Icons drawn in the Diagram layer shall be avoided. Particularly, icons of Diagram layer shall be avoided which are equal to the icons of the Icon layer. Any graphical illustrations shall be moved to the HTML documentation instead.

Extends from Modelica.​Icons.​Information (Icon for general information packages).