This section explains how to specify units for a Value Property, how to display or hide units and unit symbols in various places.
Specifying Unit for a Value Property
When the Block has the Value Property defined, it requires a numeric value and must be typed by the Value Type, either with or without (unitless) a specified Unit.
To specify the Unit for a Value Property
Select the Value Property in the Block compartments.
If the ISO-80000 library is not uploaded in your project, click the ISO button on the smart manipulator toolbar.
Warning
If you work with projects older than version 18.0, which use the QUDV library and SysML 1.3 library, the ISO-80000 library will not be compatible.
If you work with Teamwork projects, the ISO-80000 library is uploaded by default.
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Open the Select Type menu in one of the following way:
Click .
Press Ctrl+T.
From the shortcut menu, select Type.
Select the Value Type by typing the quantity name and unit name in the following syntax: quantity name[unit name].
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Unit libraries
- If you cannot find a suitable Unit in the standard libraries, you can create custom Units. Learn how to create custom units >> - You can manage the scope of provided units with the Package Import feature.
The unit is specified for a Value Property. As example, see the figure below.
The stoppingDistanceValue Property typed by distance[metre] Value Type.
The full name of the unit (e.g. metre, kilogram) is shown by default next to the Value Property on the Block compartments.
To hide/display full name of unitfor Value Property
Select the Block shape.
From its shortcut menu, select Symbol Properties.
Select the All options display mode.
Find the Show Attributes Tagged Values option.
Set its value to true to show the unit (default), or false to hide it. The full name of the unit is shown/hidden next to values in brackets in the compartments.
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Displaying/hiding unit symbols for Value Property
You can show the unit symbol in brackets (e.g. (m), (kg)) next to the Value Property on the Block compartments. If the Value Property has a value defined, unit symbol in brackets is hidden (see the figure below). How to show unit symbols next to values >>
To display/hide unitsymbol next to Value Property
Select the Block shape.
From its shortcut menu, select Symbol Properties.
Find the Show Unit on Value Property option.
Set its value to true to show the unit symbol, or false (default) to hide it. The unit symbol is shown/hidden next to Value Property.
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Displaying/hiding units symbols for values
You can hide or display the symbol of units (e.g. m, kg):
You can display or hide the unit symbols (e.g. m, kg) of values in the whole project when the Unit is already defined for the Value Property and it has a value specified. For projects older than version 18.5, you must enable the Show Units option in the Project Options dialog if you want to see unit symbols. As of version 18.5, this option is enabled by default for any new projects.
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To display/hide unitssymbols next to values
Select Options > Project.
In the Project Options dialog, expand the General option group and select SysML.
Set the Show Units option value to true to show unit symbols, or false to hide. The unit symbols are shown next to the values in the compartments.
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Displaying/hiding unit symbols next to slots
You can display a unit symbol for a slot on the Instance Specification shape by specifying it in the following ways:
To show unit symbols in cells of the Instance Table
Click the Options button.
Select the Show Units on Values option. The unit symbols are displayed next to the values in cells.
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Warning
The Show Units on Values option does not allow you to specify units directly in the row of the Instance Table. If you want to edit them, enable the Show Unit option in the Project Options dialog. How to enable Show Units option >
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To show the unit symbol in the column header of the Instance Table
Click the Options button.
Select the Show Units on Columns option. The unit symbols are displayed on the column header.
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Related pages
Sample model
The model used in the figures of this page is the Extract requirement values sample model that comes with SysML Plugin. To open this sample do one of the following: