- As proof-of-concept, I've got Perl and PHP implementations that work and
- feel largely the same -- Python, Ruby and other implementations are welcome.
+ As proof-of-concept, I've got Perl, PHP, Python and Ruby implementations
+ that work and feel largely the same -- other implementations are welcome.
+ (This is backed up by a test suite, which ensures that all the different
+ implementations return structurally equivalent XML for a certain set of
+ test cases. Porting to a new language is not difficult, and once you've
+ got all the test cases to pass, your work is most likely done.)