If an element that is being parsed is both a property and a microformat, values are extracted for the property. In spec look for: “if that child element itself has a microformat ("h-*" or backcompat roots) and is a property element”.

I would expect dt- properties to get a value based on a dt- property within the nested microformat.

Change proposal:

• if that child element itself has a microformat ("h-*" or backcompat roots) and is a property element, add it into the array of values for that property as a { } structure, add to that { } structure:
  • value:
    • if it's a p-* property element, use the first p-name of the h-* child
    • else if it's an e-* property element, re-use its { } structure with existing value: inside.
    • else if it's a u-* property element and the h-* child has a u-url, use the first such u-url
    • else if it's a dt-* property element and the h-* child has a dt-* property of its own, use the first such dt-* property value
    • else use the parsed property value per p-*,u-*,dt-* parsing respectively

(Only the second to last step is new.)