So, the context would be: an export format for complex, multi-paragraphs textual documents with meta-information. If you add the condition that it be human-rea

So, the context would be: an export format for complex, multi-paragraphs textual documents with meta-information. If you add the condition that it be human-readable, I admit I am not able to point to an existing format that is obviously better suited for this than XML.