Example of Apple Property List (Plist) DTD Validation With xmllint

bad.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>A</key>
    <key>B</key>
    <string>sshaw</string>
    <string>DDEX</string>
  </dict>
</plist>

good.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>A</key>
    <string>sshaw</string>
  </dict>
</plist>

xmllint output

~/code/ruby/class2 >xmllint --noout --valid ~/Desktop/good.plist
~/code/ruby/class2 >xmllint --noout --valid ~/Desktop/bad.plist
/Users/sshaw/Desktop/bad.plist:9: element dict: validity error : Element dict content does not follow the DTD, expecting (key , (array | data | date | dict | real | integer | string | true | false))*, got (key key string string )
  </dict>
         ^