About FoXy

FoXy is a KISS (Keep It Simple and Stupid) pure Fortran library for parsing and emitting XML files and tags.

What is FoXy?

Modern Fortran standards (2003+) introduced better support for string manipulation. Exploiting these capabilities, FoXy provides an easy-to-use module library to parse and emit XML, suitable for use in scientific and engineering codes written in modern Fortran.

• Pure Fortran — no C bindings, no ISO_C_BINDING, no wrappers
• Fortran 2008+ standard compliant
• OOP designed — two clean classes: xml_tag and xml_file
• FOSS — multi-licensed (GPL v3 for open-source, BSD 2/3-Clause and MIT for commercial use)

Why FoXy?

Other Fortran XML libraries exist — xml-fortran, xmlf90, fox, tixi — but FoXy was created to fill gaps in:

• Active maintenance
• Modern Fortran design (OOP, deferred-length allocatable characters)
• Pure Fortran implementation (no C binding layer)
• Parallel architecture safety (thread/process safe)
• Comprehensive testing

Compiler Support

Compiler	Status
GNU gfortran ≥ 14.2.0	Supported
Intel ifort ≥ 16.x	Supported
IBM XL Fortran	Not tested
g95	Not tested
NAG Fortran	Not tested
PGI / NVIDIA	Not tested

Authors

• Stefano Zaghi — @szaghi
• Fortran FOSS Programmers - https://github.com/Fortran-FOSS-Programmers

Contributions are welcome — see the Contributing page.

Copyrights

FoXy is distributed under a multi-licensing system:

• For FOSS projects: GPL v3
• For closed-source / commercial projects:
  • BSD 2-Clause
  • BSD 3-Clause
  • MIT