What is the difference between 'twins' and siblings in IMS?

RDBMS from IBM and IBM's Hierarchical DBMS and Transaction Manager (IMS DC).
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Disha Shetty
Registered Member
Posts: 20
Joined: Sat Aug 17, 2013 4:54 pm

What is the difference between 'twins' and siblings in IMS?

Post by Disha Shetty »

Hi,

What is 'Siblings' means in IMS. What is the difference between 'twins' and siblings in IMS DB. I read about it, however, it's confusing.
Quasar Chunawala
Registered Member
Posts: 34
Joined: Sun Aug 11, 2013 4:48 pm
Location: Pune

Re: What is the difference between 'twins' and siblings in I

Post by Quasar Chunawala »

Hi Disha -

Image

Siblings - Segments that share the same parent. Example : B,E1 and E2. C1,C2 and D. F1,F2,G and H.
Twins - Multiple segment occurrences that share the same parent occurrence. Example : E1 and E2, C1 and C2, F1 and F2.

Hope it helps.
Disha Shetty
Registered Member
Posts: 20
Joined: Sat Aug 17, 2013 4:54 pm

Re: What is the difference between 'twins' and siblings in I

Post by Disha Shetty »

Thanks Quasar - this was a nice explanation and helped me.

Thanks,
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