My question is similar to this, but for ConTeXt.
I have multiple documents, that are to be bundled as a set (e.g. textbook, workbook, teachers' guide). I frequently need to make a cross-reference to another item, e.g. the workbook might say "Refer to Article 3 on p. 1 of the textbook."
Is there a way to make such cross-references? s Hyperlinking is not needed.