| Links:
logical or physical? (cont) |
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| l | Definition left
vague in the DB design |
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| l | Added attribute
“containing_link_id” to link_info |
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| – | Currently unused |
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| – | Allows for
representation of tree structures: |
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| ATM channel |
| VC #1 |
| VC #3 |
| VC #2 |