Is superclass relationships also valid for subclasses in an ER diagram?

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In an ER diagram, if the superclass is in a relationship with another entity set will that relationship also valid for the subclasses?

Jan 22nd, 2015

not necessarily

Jan 22nd, 2015

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Jan 22nd, 2015
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Jan 22nd, 2015
Jun 24th, 2017
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