Include partial content from another scribble document

Thanks for the pointers. This helps already, although I now realize that I didn't phrase my question precise enough.

With dynamic-require I can assign the doc to a variable and then reference the part (or other content) as I want to, so that's good. I now have two follow-up questions:

  1. When I render both documents, I now have a warning about multiple keys (WARNING: collected information for key multiple times). Is there an easy way of renaming the tags that I include?
  2. Is there a more convenient way of referencing other content? Ideally I could use something like the tagging function from scribble, but instead of linking to the content, it would just include it.

Currently, my files are as follows.
use.scrbl:

#lang scribble/base

@(require scribble/core)

@(define x (dynamic-require "doc.scrbl" 'doc))

@(car (part-blocks x))
@(car (part-parts x))

and doc.scrbl:

#lang scribble/base

text

@section{s1}
content

When I now call scribble {doc,use}.scrbl I get the following output/warning:

WARNING: collected information for key multiple times: '(index-entry (part "s1")); values: (list '("s1") (list (element #f '("s1"))) (part-index-desc)) (list '("s1") (list (element #f '("s1"))) (part-index-desc))
WARNING: collected information for key multiple times: '(part "s1"); values: '#(("s1") (part "s1") (1) #<path:doc.html> #f) '#(("s1") (part "s1") (1) #<path:use.html> #f)
 [Output to doc.html]
 [Output to use.html]

I am not sure if the warning is important, but I suppose if I now wanted to link to the section, then scribble would rightfully trip up as it does not know which one to refer to. So I suppose renaming would be a good idea.

To expand on this point a bit more, in the document above, I can now reference the section s1 via @secref["s1"] and get a link to the part/section. What would be nice is another function that essentially works like secref but instead includes the content (possibly renaming the tag to a unique string) in the document where the function is called.