How to copy documents like Adobe Illustrator's "PlacedItems" linking method?

[divib-cc]

Adobe Illustrator 'PlacedItems' small file.
Illustrator save pdf:
<xmpMM:Manifest>
<rdf:Seq>
<rdf:li rdf:parseType="Resource">
<stMfs:linkForm>EmbedByReference</stMfs:linkForm>
<stMfs:reference rdf:parseType="Resource">
<stRef:filePath>C:\Users\Administrator\Desktop\XXX.pdf</stRef:filePath>
<stRef:documentID>xmp.did:22e50af2-c19d-6f43-8515-c9c9bbf0ba21</stRef:documentID>
<stRef:instanceID>uuid:ec71e084-d7fa-4ec6-b624-e4bc710e8c98</stRef:instanceID>
</stMfs:reference>
</rdf:li>
<rdf:li rdf:parseType="Resource">
<stMfs:linkForm>EmbedByReference</stMfs:linkForm>
<stMfs:reference rdf:parseType="Resource">
<stRef:filePath>C:\Users\Administrator\Desktop\XXX.pdf</stRef:filePath>
<stRef:documentID>xmp.did:22e50af2-c19d-6f43-8515-c9c9bbf0ba21</stRef:documentID>
<stRef:instanceID>uuid:ec71e084-d7fa-4ec6-b624-e4bc710e8c98</stRef:instanceID>
</stMfs:reference>
</rdf:li>
</rdf:Seq>
</xmpMM:Manifest>
<xmpMM:Ingredients>
<rdf:Bag>
<rdf:li rdf:parseType="Resource">
<stRef:filePath>C:\Users\Administrator\Desktop\XXX.pdf</stRef:filePath>
<stRef:documentID>xmp.did:22e50af2-c19d-6f43-8515-c9c9bbf0ba21</stRef:documentID>
<stRef:instanceID>uuid:ec71e084-d7fa-4ec6-b624-e4bc710e8c98</stRef:instanceID>
</rdf:li>
</rdf:Bag>
</xmpMM:Ingredients>
pdf-lib copy Illustrator-pdf save pdf:
"DocumentFiles"
%%DocumentFiles:C:\Users\Administrator\Desktop\XXX.pdf %%+C:\Users\Administrator\Desktop\XXX.pdf