Thanks Tim. Yes, I have different objects in each snippet. For example. I have a collection page that contains a collection, an image with text section, a gallery, and lastly a video.
I have created Schema markup for the collection page, and for all the subsections. Each section is assigned its own object. Thus my question regarding @Id . Each section has a standalone purpose, but is related to every other section. Priority overall is to ensure that search engines recognize that each markup contribute to the collection page as a whole.
Sounds like I can get away with using the main url as the @Id followed by a tag particular to the section