Type conversion

• takes place when data are passed between DOM, XPath and Perl

• Automatic:

  • operator overloading for XPath/DOM objects in Perl
  • XPath to DOM, DOM to XPath (on the C level)

• Manual:

  • helper Perl functions, such as nodelist():
  • $fields = { nodelist(split /-/, “1976-10-05”) };
  • ls //issue[@year=$fields[1] and @month=$fields[2]];