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The [relational-theory] tag should be used for questions about the relational model ( see https://dl.acm.org/citation.cfm?id=362685 ), which is not the case so I removed it. Added two tags of relevance. Made body & title rewordings.
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MDCCL
MDCCL
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How to express a "some of which are" and "not all are" relationship with EERenhanced entity-relationship diagrams?

For example:

Gardens have attribute gate, Condos have attribute door. Some of the Gardens and Condos are Private_Properties. On the other hand, Private_Properties are not restricted to only Gardens or Condos.

How can these non-exclusive relationship be illustrated with EERan enhanced entity-relationship diagram (EERD)?

How to express a "some of which are" and "not all are" relationship with EER diagrams?

For example:

Gardens have attribute gate, Condos have attribute door. Some of the Gardens and Condos are Private_Properties. On the other hand, Private_Properties are not restricted to only Gardens or Condos.

How can these non-exclusive relationship be illustrated with EER diagram?

How to express a "some of which are" and "not all are" relationship with enhanced entity-relationship diagrams?

For example:

Gardens have attribute gate, Condos have attribute door. Some of the Gardens and Condos are Private_Properties. On the other hand, Private_Properties are not restricted to only Gardens or Condos.

How can these non-exclusive relationship be illustrated with an enhanced entity-relationship diagram (EERD)?

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jexplorer
jexplorer
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How to express a "some of which are" and "not all are" relationship with EER diagrams?

For example:

Gardens have attribute gate, Condos have attribute door. Some of the Gardens and Condos are Private_Properties. On the other hand, Private_Properties are not restricted to only Gardens or Condos.

How can these non-exclusive relationship be illustrated with EER diagram?