Siemens COMOS Operating Manual page 13

You can find additional information on this topic in the "3D Integration Operation" and "3D
Integration Administration" manual.
Nested classes
You have the option of nesting classes. This is done by allocating a class that has already
been defined (class A) to another class (class B). All components from class A are
automatically available in class B and must not violate the defaults defined in class B. See also
chapter Pipe parts table (Page 87).
PipeSpec Designer
Operating Manual, 09/2014, A5E32076948-AA
2.3 Classes managed in PipeSpec Designer
Introduction
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