Namespaces and DTDs

• DTDs must declare the qualified names

  <!ELEMENT svg:text (#PCDATA)>

• If the prefix changes, the DTD needs to change to.

• Parameter entity references can help when the prefix changes or is removed:

  <!ENTITY % mathml-colon               ''>
  <!ENTITY % mathml-prefix              ''>
  
  <!ENTITY % mathml-exp                 '%mathml-prefix;%mathml-colon;exp' >
  <!ENTITY % mathml-abs                 '%mathml-prefix;%mathml-colon;abs' >
  <!ENTITY % mathml-arg                 '%mathml-prefix;%mathml-colon;arg' >
  <!ENTITY % mathml-real                '%mathml-prefix;%mathml-colon;real' >
  <!ENTITY % mathml-imaginary           '%mathml-prefix;%mathml-colon;imaginary' >