integration between two different work-item type with in same project area
Accepted answer
There are plenty of built-in link types that you can use for linking work items in the same project areas, such as parent/child, duplicate of/duplicated by and etc. If you want a new link type, you will need some development work to achieve this.
https://www.ibm.com/developerworks/mydeveloperworks/blogs/extendingrtc/entry/newlink?lang=en
If this is not you want, please explain in details what "integration" you really mean.
https://www.ibm.com/developerworks/mydeveloperworks/blogs/extendingrtc/entry/newlink?lang=en
If this is not you want, please explain in details what "integration" you really mean.