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# Breaking Changes in Sigma
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Improvement sometimes makes it unavoidable to break with the past. This file describes the planned and implemented
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breaking changes since 2019. Monitor this file if you use Sigma in productive environments.
Columns:
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* Date: The date the change was or will be implemented. Planned dates may be subject of changes.
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* Status may be one of:
* Planned: there's the idea, but work hasn't begun.
* Development: the change is currently developed.
* Implemented: the development is finished, but the change was not yet merged to the master.
* Merged: the change has been merged to the master branch. Breaking changes affecting only rules
skip this state.
* Released: the change has been released officially, this means:
* Code or configuration of Sigma tools was pushed as [PyPI release ](https://pypi.org/project/sigmatools/ )
* Sigma rules were merged to master.
* Issues: GitHub issues in the project repository for further details.
* Commit/Branch:
* a development branch for the states *Development* and *Implemented* .
* a commit reference to the merge commit for states from *Merged* .
* Release: [PyPI release ](https://pypi.org/project/sigmatools/ ) that implements or will implement the change.
* Description: contains a short description of the change.
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| Date | Status | Issues | Commit/Branch | Release | Description |
|------------|----------|---------------------|-----------------|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2019-10-01 | Planned | - | - | - | Field name cleanup |
| 2019-08-01 | Released | - | config-cleanup | 0.12 | Configuration name cleanup |
| 2019-08-01 | Released | - | devel-modifiers | 0.12 | Pipe character must be escaped with backslash in field value names due to introduction of value modifiers |
| 2019-03-02 | Released | #136 #137 #139 #147 | 56a1ed1 | 0.9 | Introduction of [generic log sources ](https://patzke.org/introducing-generic-log-sources-in-sigma.html ) and *process_creation* as first generic log source. |