# Data Management (DM)
`DM` objects are used to manage communication between the algebraic structures in PETSc (`Vec` and `Mat`) and mesh data structures
in PDE-based (or other) simulations. See, for structured grids `DMDA`, for staggered grids `DMSTAG`, and for unstructured grids `DMPLEX`.
Users guide chapter: [](part_dm).
Examples
Source files
gmshlex.h
plexcoarsen.c
plexdd.c
plexfvm.c
plexhdf5xdmf.c
plexindices.c
plexpoint.c
plexsection.c
plexegads.c
plexegadslite.c
plexextrude.c
plexgenerate.c
plexply.c
plexreorder.c
plexadapt.c
plexcheckinterface.c
plexcreate.c
plexfluent.c
plexglvis.c
plexinterpolate.c
plexmetric.c
plexnatural.c
plexpartition.c
plexpreallocate.c
plexrefine.c
plexsfc.c
plexsubmesh.c
plexvtk.c
pointqueue.c
plex.c
plexceed.c
plexcgns.c
plexdistribute.c
plexexodusii.c
plexfem.c
plexgeometry.c
plexgmsh.c
plexhdf5.c
plexorient.c
plexproject.c
plextree.c
plexvtu.c
Directories
f90-custom
adaptors
cgns
generators
tests
transform
tutorials
exodusii