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Select the class Main Dimensions. 
in the right-hand side of the knowledge browser, and select New Parameter/Function(Ctrl+I), see figure 3. Note that the last parameter in focus will be shown in the input field (most probably QKnowledgebaseVersion). Delete this parameter, type Lpp and click the Value button. Repeat these actions for the parameters B and T.
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In the larger area of the Frame Viewer, a reference can be assigned to the parameter. A proper reference is important, as users of the knowledgebase may not be certain of the exact meaning of the parameter. Please also read Documentation of knowledge for more details.
Provide Lpp with the reference Length of the ship (figure 4).
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