Work Item Link Types in Visual Studio TFS 2010

What's the difference between the following work items link types in Visual Studio TFS 开发者_StackOverflow中文版2010?

• Test Case
• Shared Steps
• Tests
• Tested By

Thanks,

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"Test Case" and "Shared Steps" are forward name and reverse name for the link type Microsoft.VSTS.TestCase.SharedStepReferencedBy. Similarly, "Tested By" and "Tests" are forward name and reverse name for the link type Microsoft.VSTS.Common.TestedBy.

Forward name: This is the name with which created link will be known as on the source side.

Reverse Name: This is the name with which created link will be known as on the target side.

For detailed example refer "TFS 2010: Overview of Workitems linking – Use and Custom Link Type Creation"