(a)
<puppy> <name>Cleo</name> <color>Black</color> <photo> q^@/0?%5</?? ... 0t???? </photo> </puppy>(b)
<puppy> <name>Cleo</name> <color>Black</color> <photo xsi:type="base64Binary"> 6f9cd3e5(...) </photo> </puppy>(c)
<puppy> <name>Cleo</name> <color>Black</color> <photo> http://www.somehost.com/cleo.jpg </photo> </puppy>
Example 1: (a) Bad idea; (b) base64Binary encoding; (c) referencing the binary data.