고급 사용자 정의 > Services and Infrastructure Customization > Customizing Data Formats > Adding and Updating Data Formats for Content Holders
  
Adding and Updating Data Formats for Content Holders
When content files are added to a content holder object, the format of the file (based on the file name extension) is set automatically upon upload. The available formats are stored as DataFormat objects in the system.
In some cases, you may need to augment or change the existing data formats to accommodate additional MIME types associated with your enterprise data.
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Any changes made to existing data formats should be treated as customizations to your code. Be sure to follow the coding practices introduced in the Managing Customizations section.
A data format:
Sets the MIME type when a file is downloaded.
Supplies the icon that will represent the object in browser displays.
Informs the user of the file format.
You can use a command-line utility, provided by Windchill, to maintain data format objects.