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# 6.0.2
| Released yyyy/mm/dd, [GitHub Release Link](https://github.com/ufz/ogs/releases/tag/6.0.2)
## Release notes
The second release of ogs6 introduces Neumann boundary conditions and VTK result output.
### Features:
- [Neumann boundary conditions](http://docs.opengeosys.org/docs/benchmarks/elliptic/groundwater-flow-neumann)
- Refactored mesh property classes to [enable VTK output](https://github.com/ufz/ogs/pull/692)
- Builds with MinGW (GCC) on Windows, see [Developer Guide](http://docs.opengeosys.org/docs/devguide/getting-started/prerequisites) and the new MinGW platform instructions
- [Cross-compiling for Windows with MXE on Mac OS](http://docs.opengeosys.org/docs/devguide/advanced/cross-compiling)
- [Support for new cross-platform IDE CLion](http://docs.opengeosys.org/docs/devguide/development-workflows/development-ides#clion)
### Fixes
- Performance optimizations in VTK mesh conversion, [PR #695](https://github.com/ufz/ogs/pull/695)
### Infrastructure
- Test runtime is monitored at Jenkins for [normal](https://svn.ufz.de:8443/job/OGS-6/job/Tests_Linux/) and [nightly large tests](https://svn.ufz.de:8443/job/OGS-6/job/Tests_Linux_Large/)
- Utilities are build by separate Jenkins Jobs, e.g. [Win_Utils](https://svn.ufz.de:8443/job/OGS-6/job/Win_Utils/)
## Test examples
- Example 1: TODO
## Next steps
### In development
- OGS#PETSc interface for parallel computing
### Planned
- Parabolic solver
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# 6.0.1
| Released 2015/03/02, [GitHub Release Link](https://github.com/ufz/ogs/releases/tag/6.0.1)
The 6th version of OpenGeoSys (OGS) is under way. After single and coupled FORTRAN modules in ROCKFLOW 1+2, the C version 3 with dynamic data structures, the object-oriented C++ parallelized version 4, completed with data integration and visualization tools by version 5; ogs6 - as an open source project - is aimed at performing on supercomputing platforms and providing complete workflows for solving of coupled multi-field problems in real world applications. The major paradigms of ogs6 are being developer-friendly, performing, and user-friendly.
## Important links:
- Getting started tutorial: http://docs.opengeosys.org/docs/quickstart
- Descriptions of selected benchmarks: http://docs.opengeosys.org/docs/benchmarks
- Source code access: https://github.com/ufz/ogs
- Developer guide: http://docs.opengeosys.org/docs/devguide
## Release notes
The first version ogs6 is dedicated for elliptic problems.
### Features:
- Basic structures of processes
- Mathematical operations are based on Eigen3 library
- Linear solvers: DenseMatrix with Gauss elimination, and LIS (http://www.ssisc.org/lis/)
- XML based IO
- Standard finite element method (FEM)
- Available element types: lines, triangles, quads, hexahedra
- Dirichlet boundary conditions
- Linear elliptic solver (e.g. Groundwater flow) for scalar quantities in homogeneous media
### Fixes
- DenseMatrix Gauss algorithm pivoting
## Test examples
- Example 1: Unit square (access)
- Example 2: Unit cube (access): has 1000 hexahedra elements with Dirichlet boundary conditions (u=1|x=0) and (u=-1|x=1)
## Next steps
### In development
- OGS#PETSc interface for parallel computing (02/2015*planned)
- Neuman boundary conditions (03/2015*planned)
### Planned
- Parabolic solver