What are the differences between "information structure" and "functional structure" in PRD?

Information structure: specifies the relationship between information nodes, so that users can know what node they are at, and the functional structure of the previous node or the next node they can jump to: how to let users jump from one node to another, or jump from the same node, for example, ordering website, when users are browsing dishes, users know that they can jump to the order node, that is, add the order function, and also know that they can jump to the same node with only spicy taste.

Product information structure: refers to the business that can be solved by the software or system, while the product function structure diagram is a detailed and more specific functional module.

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