cansas1d binding Fortran
The development of the FORTRAN language, so beloved of scientists, pre-dates the development of XML. And it shows. FORTRAN is not a language that manipulates strings with ease, and this makes parsing XML decidely awkward. So unless you really have to use FORTRAN, you are probably better off with C/C++ (or something else more 'modern'), see for example Daniel Veillard's LIBXML2 library at http://xmlsoft.org/ or Frank van den Berghen's parser at http://www.applied-mathematics.net/tools/xmlParser.html.
If you have to use a dialect earlier than FORTRAN-90 (F90), then the chances are you will have to code your own parser.
For later dialects, there are some SDK's available on the Web:
For F90:
XMLPARSE - by Arjen Markus at http://xml-fortran.sourceforge.net/
FoX - by Toby White & others at http://uszla.me.uk/space/software/FoX/
For F95:
XML - by Mart Rentmeester at http://nn-online.org/code/xml/
Steve King[1] (ISIS) has a VMS F77 routine that will read CanSAS XML v1.0 files.