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# PCBDDCGetDirichletBoundariesLocal
Get parallel `IS` for Dirichlet boundaries (in local ordering)
## Synopsis
```
#include "petscpc.h"
PetscErrorCode PCBDDCGetDirichletBoundariesLocal(PC pc, IS *DirichletBoundaries)
```
Collective
## Input Parameter
- ***pc -*** the preconditioning context
## Output Parameter
- ***DirichletBoundaries -*** index set defining the subdomain part of Dirichlet boundaries
## Note
The `IS` returned could be the same passed in earlier by the user (if provided with `PCBDDCSetDirichletBoundariesLocal()`)
or a global-to-local map of the global `IS` (if provided with `PCBDDCSetDirichletBoundaries()`).
In the latter case, the `IS` will be available only after `PCSetUp()`.
## See Also
`PCBDDC`, `PCBDDCGetDirichletBoundariesLocal()`, `PCBDDCGetDirichletBoundaries()`, `PCBDDCSetDirichletBoundaries()`
## Level
intermediate
## Location
src/ksp/pc/impls/bddc/bddc.c
## Implementations
PCBDDCGetDirichletBoundariesLocal_BDDC in src/ksp/pc/impls/bddc/bddc.c
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[Index of all PC routines](index.md)
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