# Linking use case extensions to a step or steps in the basic flow

**URL:** <https://forums.visual-paradigm.com/t/linking-use-case-extensions-to-a-step-or-steps-in-the-basic-flow/9300>\
**Category:** General Questions/Discussions\
**Created:** [January 24, 2007, 11:22pm UTC](https://forums.visual-paradigm.com/t/linking-use-case-extensions-to-a-step-or-steps-in-the-basic-flow/9300 "2007-01-24T23:22:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![JohnSC](https://avatars.discourse-cdn.com/v2/letter/j/a6a055/32.png) [@JohnSC](https://forums.visual-paradigm.com/u/JohnSC)\
**Post date:** [January 24, 2007, 11:22pm UTC](https://forums.visual-paradigm.com/t/linking-use-case-extensions-to-a-step-or-steps-in-the-basic-flow/9300/1 "2007-01-24T23:22:54Z")

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Hi,

Is there a way to link one or more extension scenarios/flows to the main success scneario/basic flow? e.g.:

* * *

MSS

1. actor does something
2. system…
3. actor…
4. system…
5. use case ends (success)

EXT1  
1.a actor does something else:  
1.a.1 system…  
1.a.2 actor…  
1.a.3 continue from step 2

## EXT2 1.b actor does something really stupid: 1.b.1 system… 1.b.2 actor… 1.b.3 use case ends (failure)

Now, because the two extensions EXT1 and EXT2 are both associated with step 1 of the main success scenario, if I were to delete step 1 of the MSS, I would expect the two extensions to also be deleted; similarly, if I were to insert a new step in the MSS, resulting in the existing step 1 being renumbered to step 2, I would expect the two extensions to be renumbered as well, in order to preserve their association with the step in the MSS.

Q: is this functionality supported? If so, how can I access it?  
Q: if it is not supported, can I request that it be considered?

Many thanks,

JohnSC

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**Author:** ![Jick](https://avatars.discourse-cdn.com/v2/letter/j/ea666f/32.png) [@Jick](https://forums.visual-paradigm.com/u/Jick)\
**Post date:** [January 25, 2007, 9:38am UTC](https://forums.visual-paradigm.com/t/linking-use-case-extensions-to-a-step-or-steps-in-the-basic-flow/9300/2 "2007-01-25T09:38:05Z")

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Hello JohnSC,

Thank you for your post. I understand what you need. But currently, I regret to say that it is not being supported. I have notified our developers about your suggestion. If we will support this feature, I will let you know.

Best regards,  
Jick