A Marketplace image URN in Azure has the following attributes:
- Publisher - The organization that created the image. Examples: Canonical, MicrosoftWindowsServer
- Offer - Name of a group of related images created by a publisher. Examples: Ubuntu Server, WindowsServer
- SKU - An instance of an offer, such as a major release of a distribution. Examples: 18.04-LTS, 2016-Datacenter
- Version - The version number of an image SKU.
If you are developing or using an application that need to access the Azure Marketplace image, you would need to use image URNs. Following is the steps to indentify an image URN