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Delete core universe link from Derived universe

Hi,

I do some test on linked universe ;

Test 1

1. Create Universe UnvA, UnvB, UnvC

2. Create derived universe UnvDe1, add link UnvA, UnvB, UnvC

3. Create Webi document Rpt1 using UnvDe1, but only selecting objects from UnvB

4. Open UnvDe1, delete link of UnvA, UnvC

5. refresh Webi Rpt1 the document, an error message

[some objects are no longer available in the universe

See your Bussiness Objects administrator (WIS 00001)] appears.

Test 2:

1. Create Universe UnvA, UnvB, UnvC

2. Create derived universe UnvDe2, add link UnvA, UnvB, UnvC

3. Create Webi document Rpt2 using UnvDe2, but only selecting objects from UnvB

4. Open UnvDe2, delete link of UnvC

5. Refresh Webi Rpt2, there is no problem.

Test 3:

1. Create Universe UnvA, UnvB, UnvC

2. Create derived universe UnvDe3, add link UnvA, UnvB, UnvC

3. Create Webi document Rpt3 using UnvDe3, but only selecting objects from UnvC

4. Open UnvDe3, delete link of UnvA, UnvB

5. refresh Webi Rpt3, an error message

[some objects are no longer available in the universe

See your Bussiness Objects administrator (WIS 00001)] appears.

Test 4:

1. Create Universe UnvA, UnvB, UnvC ,UnvD

2. Create derived universe UnvDe4, add link UnvA, UnvB, UnvC, UnvD

3. Create Webi document Rpt4 using UnvDe4, but only selecting objects from UnvC

4. Open UnvDe3, delete link of UnvD

5. refresh Webi Rpt4, there is no problem

Test 5:

1. Create Universe UnvA, UnvB, UnvC ,UnvD

2. Create derived universe UnvDe5, add link UnvA, UnvB, UnvC, UnvD

3. Create Webi document Rpt5 using UnvDe5, but only selecting objects from UnvC

4. Open UnvDe3, delete link of UnvA, UnvB

5. refresh Webi Rpt5, an error message

[some objects are no longer available in the universe

See your Bussiness Objects administrator (WIS 00001)] appears.

From the test, it shows that using derived universe to create webi report, when deleting link to core universe, the order to add link will impact the result.

If adding link in the order of UnvA,UnvB,UnvC, when you want to delete link, you must in the order of UnvC,UnvB,UnvA.

So if you have used the UnvB, The UnvA should not be deleted.

I want to know this is by design? or a Bug?

Could some one help me.

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1 Answer

  • author's profile photo Former Member
    Former Member
    Posted on Oct 08, 2010 at 07:20 PM

    I don't think it's a bug.

    What are linked universes?

    Linked universes are universes that share common components such as parameters, classes, objects, or joins. When you link two universes, one universe has the role of a core universe, the other a derived universe. When changes are made in the core universe, they are automatically propagated to the derived universes.

    What is a core universe?

    The core universe is a universe to which other universes are linked. It contains components that are common to the other universes linking to it. These universes are called derived universes. The core universe represents a re-usable library of components. A core universe can be a kernel or master universe depending on the way the core universe components are used in the derived universes.

    What are derived universes?

    A derived universe is a universe that contains a link to a core universe. The link allows the derived universe to share common components of the core universe:

    u2022 If the linked core universe is a kernel universe, then components can be added to the derived universe.

    u2022 If the linked core universe is a master universe, then the derived universe contains all the core universe components. Classes and objects are not added to the derived universe. They can be hidden in the derived universe depending on the user needs of the target audience.

    And what level of approaches you have to Link Universes:

    The following approaches when linking universes:

    u2022 Kernel approach

    u2022 Master approach

    u2022 Component approach

    Kernel approach: With the kernel approach, one universe contains the core components. These are the components common in all universes. The derived universes that you create from this kernel universe contain these core components as well as their own specific components.

    Master approach: The master approach is another way of organizing the common components of linked universes. The master universe holds all possible components. In the universes derived from the master, certain components are hidden depending on their relevance to the target users of the derived universe. The components visible in the derived universes are always a subset of the master universe. There are no new components added specific to the derived universe.

    Component approach: The component approach involves merging two or more universes into one universe. The Sales universe below was created by merging two universes: Part 1 and Part

    Hope from each definition, you can find the answer for your question.

    Thank You!!

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