fem_to_xml, a C code which reads FEM files of node coordinates and element connectivity, which define a mesh of a 1D, 2D, or 3D region and creates a corresponding DOLFIN XML file.

These mesh files can be used as input to DOLFIN or FENICS.


fem_to_xml prefix
where prefix is the common filename prefix:


The computer code and data files made available on this web page are distributed under the MIT license


fem_to_xml is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:

DOLFIN-CONVERT, a Python program which can convert mesh file from Gmsh, MEDIT, METIS or SCOTCH format to an XML format suitable for use by DOLFIN or FENICS, by Anders Logg.

FEM_TO_GMSH, a C code which reads FEM files definining a 1D, 2D or 3D mesh, namely a file of node coordinates and a file of elements defined by node indices, and creates a Gmsh mesh file.

FEM_TO_TRIANGLE, a C code which reads FEM files defining a 2D mesh of triangles, namely a file of node coordinates and a file of elements defined by node indices, and creates a corresponding pair of node and element files for use by Jonathan Shewchuk's triangle program.


FENICS, programs which illustrate the use of a collection of free software with an extensive list of features for automated, efficient solution of differential equations.

MITCHELL_FENICS, examples which illustrate the implementation of the Mitchell 2D elliptic partial differential equation (PDE) test problems using FENICS.

TET_MESH, a C code which carries out various operations on tetrahedral meshes.

TRIANGULATION, a C code which performs various operations on order 3 (linear) or order 6 (quadratic) triangulations.

XML, a data directory which contains examples of XML files, a standard, general datafile format.

XML_TO_FEM, a Python program which reads an XML file created by FENICS or DOLFIN, describing a mesh in 1D, 2D, or 3D, and creates corresponding FEM files, namely, the coordinates of nodes, and the indices of nodes that form each element.


  1. Anders Logg, Kent-Andre Mardal, Garth Wells,
    Automated Solution of Differential Equations by the Finite Element Method: The FEniCS Book,
    Lecture Notes in Computational Science and Engineering,
    Springer, 2011,
    ISBN13: 978-3642230981,

Source Code:

Last revised on 24 June 2019.