A detachable fork boom can be considered an attachment for certain types of equipment, such as forklifts or telehandlers. However, the specific classification may vary depending on the industry or regulatory standards in different regions. In general, attachments are additional components or accessories that can be added or removed from a base machine to enhance its functionality or adapt it for specific tasks.

Regarding the requirement for a data plate, it is common for attachments to have some form of identification or labeling. The purpose of a data plate or similar documentation is to provide information about the attachment, such as its specifications, weight limits, installation instructions, and any other relevant details. This information helps ensure proper and safe usage of the attachment and assists in maintenance or troubleshooting.

If you have a specific context or industry in mind, it's recommended to consult the applicable regulations, guidelines, or equipment manufacturers to determine the exact requirements for detachable fork booms and whether a data plate is necessary in your situation.