HTML Element for key/value pair

I think HTML should have an element for Key/Value pairs, that unlik
the dlelement, will only allow one value for each key.
something like:
<kv><k>Key</k><v>Value</v></kv>
Or in a list:
<kvl>
  <kv><k>Key</k><v>Value</v></kv>
  <kv><k>Key</k><v>Value</v></kv>
  <kv><k>Key</k><v>Value</v></kv>
</kvl>