Data Type Text (text field: A type of field whose content is text. Examples include the Task Name and Email Address fields. This field can contain up to 255 characters.)
Entry Type Calculated (calculated field: A field in which the value is determined by Project based on information in other fields. Project may recalculate the value automatically or when you specify, depending on your choice of calculation settings.)
Description The Resource GUID field contains the generated unique identification code for each resource in your project. No two resources will have the same Resource GUID.
How Calculated As soon as you create a new resource (resources: The people, equipment, and material that are used to complete tasks in a project.), Project automatically generates a unique identification code for the resource and stores it in the Resource GUID field.
Best Uses Insert the Resource GUID column into a resource sheet when you need to see the unique identifier for each resource. This is particularly useful to help with programming and debugging custom applications in Project.
Example You are creating a macro that references specific resources in your project. To obtain unique identifiers for these particular resources, you insert the Resource GUID column into the Resource Sheet.
Remarks The Resource GUID is different from the Unique ID field for resources. The Unique ID is a sequential number that reflects the order in which resources were added to the project. By contrast, the Resource GUID is a unique alphanumeric string that represents each resource for programming purposes.