Windchill Fundamentals > Working with Windchill Objects > Object Overview > Object Versions
  
Object Versions
Every object in Windchill has a version, for example:
A version consists of a letter followed by a separator such as a period (.), followed by a number.
• The number represents the iteration of the object. The iteration is incremented each time the object is checked in.
• The letter represents the revision of the object. Use the Revise action to change the object revision. For more information, see Revising an Object.
When revising objects, a revision scheme represents a sequence of characters identifying subsequent versions of a revisable object. Your site might establish a revision scheme policy that is unique for your site. When you revise an object, the latest iteration of that object is used as the content for the new revision.
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The Revise action is only available for objects within products or libraries.
When revising objects, a revision scheme represents a sequence of characters identifying subsequent versions of a revisable object. Your site might establish a revision scheme policy that is unique for your site. When you revise an object, the latest iteration of that object is used as the content for the new revision.
* 
The Revise action is only available for objects within products or libraries.
See the following topics for additional details on working with object versions:
• Capturing Part Design History—Provides information on using the version history when working with parts and part structures.
• Understanding the Use of Versioning Schemes—Provides information on managing versioning rules as a context administrator.
• Object Numbering and Versioning—Provides information on customizing the Windchill out-of-the-box versioning and numbering schemes for your site.