XML is so...powerful 😒

maps.xml

<!-- Each entry is a child, which has a key child and a val child -->
<map>
  <entry>
    <key>foo</key>
    <val>bar</val>
  </entry>
  <entry>
    <key>baz</key>
    <val>qux</val>
  </entry>
</map>

<!-- Keys and values alternate -->
<map>
  <key>foo</key>
  <val>bar</val>
  <key>baz</key>
  <val>qux</val>
</map>

<!-- Each entry is a child whose tagname is the key and content is the val -->
<map>
  <foo>bar</foo>
  <baz>qux</baz>
</map>

<!-- Each entry is a child with key attribute and content is the val -->
<map>
  <entry key="foo">bar</entry>
  <entry key="baz">qux</entry>
</map>

<!-- Sort of a combination of the previous two -->
<map>
  <foo val="bar" />
  <baz val="qux" />
</map>

<!-- Entries have two attrs, one for key, one for value -->
<map>
  <entry key="foo" val="bar" />
  <entry key="baz" val="qux" />
</map>

<!-- Attrs are themselves a map -->
<map foo="bar" baz="qux" />