A user story

I start my favourite xsf editor.
Some tabs indicate different view of my source.
I choose the code tab and I write a new function.
I choose the custom tab and select to view code and link requirement.
Now I see my code with xml link like code comment.
I click on one of the requirement link and i change the requirement.
I choose the custom tab, select to view code, and embedded requirement.
Now i see my code with my requirement