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# DMPlexPartitionLabelCreateSF
Create a star forest from a label that assigns ranks to points 
## Synopsis
```
#include "petscdmplex.h"   
PetscErrorCode DMPlexPartitionLabelCreateSF(DM dm, DMLabel label, PetscSF *sf)
```

## Input Parameters

- ***dm    -*** The `DM`
- ***label -*** `DMLabel` assigning ranks to remote roots



## Output Parameter

- ***sf    -*** The star forest communication context encapsulating the defined mapping





## Note
The incoming label is a receiver mapping of remote points to their parent rank.


## See Also
 [](ch_unstructured), `DM`, `DMPLEX`, `DMLabel`, `PetscSF`, `DMPlexDistribute()`, `DMPlexCreateOverlap()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/plexpartition.c.html#DMPlexPartitionLabelCreateSF">src/dm/impls/plex/plexpartition.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/plex/plexpartition.c)


[Index of all DMPlex routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)