# Changelog for FeatureIDE

Each release contains smaller changes, bug fixes, and performance improvements,
which can be found [here](https://github.com/FeatureIDE/FeatureIDE/milestones).
This log contains an overview of enhancements and bug fixes for each release:

### Release 3.11.1 (March 2024)
* Hotfix containing a GUI fix for the configuration editor on MacOS 

### Release 3.11.0 (March 2024)
* Improves UI of the configuration editor
  * Adds new tab showing currently selected features in a feature tree (#1452)
  * Adds functionality to adapt font size to screen size and manual font-size setting (#1417)
  * Enables automatic updates after feature model change (#1464)
* Improves UI of the feature-model editor
  * Improves feature model export dialog (#843)
  * Adds feature colors to legend (#1451)
  * Fixes context menu entries (#1300)
  * Fixes size of create/update button in constraint dialog
  * Fixes issues with default color manager
  * Fixes other issues (#1311, #1418)
* Other GUI improvements
  * Improves font colors and symbols for dark mode
  * Adds preference for enabling/disabling dark mode colors
* Improves LaTeX/TikZ export (#1419)
  * Adds support for cross-tree constraints, tree layout, and feature colors
* Improvements for example projects
  * Adds references to example projects (#1054)
  * Fixes wrong configuration files in UVL examples projects
  * Fixes mistake in code example of FeatureIDE tutorial (#1465)
* Improves feature-model slicing
  * Improves feature-tree slicing by avoiding creation of new features (#1439)
  * Fixes issues where slicing changes propositional logic in certain circumstances (#1213)
  * Fixes potential duplicate ID problem after slicing
* Adds convenience methods in FM-library
* Further bug fixes
  * Fixes handling of non-extended feature models and configurations in attributes view (#1449)
  * Fixes support for relative file paths in UVL (#1459)

### Release 3.10.0 (August 2023)
* Adds new and extended functionality
  * New feature project now allows to import an existing feature model
  * Action "Export All Features Models" is now more intuitive, working for selected files, folders, and projects. (#1404) 
  * Sampling with YASA can now be canceled properly (#1435)
  * Feature color dialog was improvement (#1411)
  * Adds prime implicant analysis (library only)
* Updates supported UVL version
  * Uses latest UVL parser
  * Enables conversion for UVL language levels (#1433, #1446)
  * Updates UVL examples (#1444)
* Bug fixes
  * Fixes minor incompatibility with latest Eclipse version
  * Fixes multiple problems in the UI (#1324, #1399, #1416, #1438) 
  * Fixes multiple problems for projects with no distinct feature model file (#1183, #1381, #1382, #1406, #1408, #1409)
  * Fixes conversion to extended feature model and configurations in feature attributes view
  * Fixes other minor bugs

### Release 3.9.3 (May 2023)
* Hotfix containing mostly bugfixes over v3.9.2
* Fixes more incompatibilities with latest Eclipse versions (#1431,#1430,#1429,#1382)

### Release 3.9.2 (March 2023)
* Hotfix containing mostly bugfixes over v3.9.1
* Improves UVL support of feature diagram editor and constraint view (#1415, #1410, #1377)
* Fixes some problem in the feature diagram editor (#1299, #1313, #1402)
* Fixes incompatibility with latest Eclipse versions (#1403)

### Release 3.9.1 (December 2022)
* Hotfix containing mostly bugfixes over v3.9.0
* Fixed example projects and added current library versions (#1375, #1380)
* Fixed multiple problems with UVL (#1285, #1304, #1378, #1386, #1391)
* Added some minor enhancements
  * Enabled product generator to create configurations only (#1325)
  * Revised feature model export dialog (#1371)
  * Changed default composer to "Feature Modelling" (#1379)
  * Added timeout functionality for CNF conversion
* Fixed other minor bugs (#1082)

### Release 3.9.0 (September 2022)
* Many enhancements and fixes for UVL
  * Added GUI support for importing sub models (#1250)
  * Added examples showcasing usage of UVL parser API (#1369)
  * Fixed various issues (#1239, #1341, #1353, #1363)
  * Improved UVL examples (#1357, #1361)
  * Replaced UVL Parser (#1341, #1367)
* Added button to reset manual selections in the configuration editor (#1237)
* Added missing license files (#1290)
* Fixed problems with failed Jenkins (#1366)
* Improved UI of feature model editor (#834, #849, #1102)
* Improved support for initial samples in YASA
* Improved performance of CNF creation
* Removed no longer supported options for FeatureHouse, including Fuji and Key (#936, #1106, #1169)
* Removed unused files (#1356)

### Release 3.8.3 (May 2022)
* Hotfix containing mostly bugfixes over v3.8.2
* Fixed bug that prevented features from being deleted in feature model editor (#1350)
* Fixed bug that prevented deletion of multiple constraints (#1342)
* Fixed bug that changed feature order in DIMACS files (#1340)
* Fixed problem when slicing alternative groups (#1348)
* Fixed typos in some dialogs for FeatureHouse (#1106)
* Improvements for FeatureIDE preference page
  * Fixed behavior when reseting options to default values
  * Fixed behavior when leaving the page without applying changes
  * Added option to omit artificial root, when saving a feature model as DIMACS file (#1340)
* Added missing actions for root feature of submodels in feature model editor (#1314)
* Added license file and corresponding information to repository root (#1290)
* Minor API improvements (#1351)

### Release 3.8.2 (April 2022)
* Hotfix containing mostly bugfixes over v3.8.1
* Added example projects for using attributes and formats with the FeatureIDE Library (#1098)
* Added support for using UVL files as default feature model (#1338)
* Bugfixes:
  * User-defined Feature Order has no effect when using FeatureHouse (#1140)
  * Fixed problems with Undo/Redo for deleting and renaming elements (#1206, #1233)
  * Fixed problem with changing default directories of a feature project (#1296)
  * Improved behavior of framework plug-in when plug-ins are faulty (#1109)

### Release 3.8.1 (November 2021)
* Hotfix containing only bugfixes over v3.8.0
* Fixed a breaking bug that resulted in a faulty CNF in some cases (#1263)
  * This bug was introduced in v3.7.0 and might affect analyses and evaluations that were performed with version v3.7.0, v3.7.1, v3.7.2, or v3.8.0
* UVL models now support spaces (#1143)
* Many other enhancements and fixes for UVL (#1159, #1210, #1175, #1196, #1194, #1174, #1180, #1298)
* Many minor fixes related to redo/undo (#1235, #1207, #1197, #1201, #1150)
* Many minor fixes related to editing feature models (#1214, #1151, #1255, #1005, #1241, #1225, #1200, #1153, #1181, #1195, #1234, #1245, #1315, #1221)
* Expansion mode is now correctly saved in the configuration editor (#1012)
* Several improvements for the constraint view (#1277, #1256)
* Improvement of the configuration map (#1178, #1253)

### Release 3.8.0 (August 2021)
* Many enhancements for UVL
   * New constraints are now handled correctly (#1164)
   * Feature Attribute Support (#1133)
   * Live updates when editing submodels (#1134)
   * Vastly improved validation of UVL format (#1076, #1156)
   * Several small improvements (#1141, #1158)
   * FeautureIDE outline now works with UVL (#1157)
* Several improvements for the feature attributes view (#713)
* Searching features now properly works in configuration editor (#1126)
* Several improvements regarding the feature-model legend (#784, #1114, #1127)
* Autocompletion of constraint dialog is improved (#781)
* Several improvements regarding zoom and layouting of feature models (#795, #809, #969, #1142)
* Feature attributes can now be obfuscated (#772)
* Undo and Redo now working as expected (#1026)
* Improvements to the configuration editor under Linux (#1055)
* Fixed a breaking bug in runtime variability feature models (#1094)
* Removed outdated support for Fuji and corresponding functionality (#936, #1106)
* Small fixes and enhancements (#844, #934, #981, #1105, #1108, #1110, #1116, #1130)

### Release 3.7.3 (November 2021)
* Hotfix containing only bugfixes over v3.7.2
* Fixed a breaking bug that resulted in a faulty CNF in some cases (#1263).
  * This bug was introduced in v3.7.0 and might affect analyses and evaluations that were performed with version v3.7.0, v3.7.1, or v3.7.2.

### Release 3.7.2 (July 2021)
* Hotfix containing only bugfixes and code quality improvements over v3.7.1
* Cleaned up outdated libraries in fm.core plug-in (#1144)
  * Removed findbugs annotations
  * Moved guidsl to AHEAD plug-in
* Fixed several issues regarding sampling algorithms
  * Fixed non-deterministic behavior of YASA and IncLing (#1145)
  * Fixed problems when using YASA and other algorithms via CLI and GUI (#1118, #1119, #1120, thanks for the report by cpwnd)
  * Added test cases to ensure correctness after future updates
* Fixed bug regarding alternatives and or-groups with one child (#1139)

### Release 3.7.1 (June 2021)
* Hotfix containing only stability improvements over v3.7.0
* Significant speed-ups when opening and working with large feature models (#1093)
* Minor fixes to the FeatureIDE library (#1111, #1100, thanks for the reports by Paul Maximilian Bittner and Kevin Feichtinger)
* Fixed problem when opening the Java editor for AHEAD projects (#1048, #1085, thanks for the reports by MrKSP and Sebastian Böhm)
* Contributions by Tobias Heß and Sebastian Krieter 

### Release 3.7.0 (October 2020)
* Universal Variability Language (UVL) integrated into FeatureIDE (#1050)
* New operation to derive subset product lines given a partial configuration (#1079)
* Significantly revised constraints view with improved performance, sorting (#874, #886, #887, #1014, #1037, #1038, #1039, #1060, #1063, #1064, #1068)
* Constraint view is updated upon deletion of constraints (#1070, thanks for the report by cpwnd)
* Removal of features that occur in cross-tree constraints by means of slicing (#200, #984)
* Subtrees of feature models can be collapsed to a specified level (#851, thanks for the report by cpwnd)
* Stability of feature-model editor (#992, #1028, #1083) and sampling with YASA (#967) improved
* API improved (#917, thanks for the report by Robert Müller)

### Release 3.6.4 (September 2020)
* Hotfix containing only stability improvements over v3.6.3
* Minor stability improvements for the feature-model editor (#1027, #1028, #1080) 
* Fixes for the automated product generation (#1018, #1046, #1066)
* Deletion of folders/packages in Antenna projects fixed (#1053)
* Enhancements for the attributes view (#1013)
* Propagation modes are restored in the configuration editor (#1049, thanks for the report by Claudia Fritsch)
* Feature-model export into SXFM format fixed (#1009, thanks for the report by Jabier Martinez)
* Feature-model generator fixed (#1008, thanks for the report by Jabier Martinez)
* When comparing feature models only examples products are generated (#264)

### Release 3.6.3 (May 2020)
* Hotfix containing only stability improvements over v3.6.2
* Performance of FeatureIDE with large feature models improved (#970, #1004)
* Performance problem when storing feature model for projects with may configurations fixed (#1011)
* T-wise configuration generation with ICPL and Chvatal fixed (#983)
* Exporting of feature models: workaround implemented to fix incompatibility of Eclipse with GTK (#1003)
* Several minor issues with constraints view fixed (#912, #1007, #1021, #1022, #1023, #1024, #1025)
* Highlighting of implicit constraints fixed (#946)
* Handling of the feature attributes improved (#996, #978, #1013)
* Expansion mode of the configuration editor stored for the workspace (#1012)
* Removed the option to Show Hidden Features in feature diagram (#961)
* Error handling in constraint dialog improved (#960)
* Compatibility of slicing with FeatureIDE extensions improved (#997)
* Removed redundant code (#933)
* Several improvements for the feature diagram editor (#932, #977, #986)

### Release 3.6.2 (January 2020)
* Hotfix containing only stability improvements over v3.6.1
* Analysis of feature models only performed if automatic analysis is enabled in the menu (#942, #944)
* Migrated FeatureIDE library examples to the API of v3.6.x (#918)
* Stability of feature model editor improved (#896, #929, #924, #937, #948, #945, #927, #925, #940)
* Automated collapsing of feature models depending on the viewer size is fixed (#938)
* Deletion of multiple features or constraints simultaneously is fixed (#935, #957)
* Fixed problem with missing default configuration when loading FeatureIDE examples (#911)
* Compatibility problems with Eclipse 2019-09 or newer fixed (#908)
* Usability of creation wizard for configurations improved (#926)
* Export of feature dependency information fixed (#931)
* Computation of implicit constraints for submodels fixed (#920)
* Sampling algorithms now support also feature names with special chars (#880)
* Usage of random seeds for certain analyses (#915)
* JavaDoc problems fixed and now checked in CI (#952)

### Release 3.6.1 (October 2019)
* Hotfix containing only stability improvements over v3.6.0
* Configuration editor required minutes after every click (#907)
* Random configurations differ in each run now (before the same seed has been used, see #915)
* Missing default configuration caused numerous problems (#911)
* Feature attributes can be updated again (#903)
* Wrong explanations for feature-model defects fixed (#905, #906, #897)
* Problems when importing feature models fixed (#793)
* Incompatibilities with Eclipse 2019-X fixed (#901)
* Feature-model slicing fixed (#900)
* Usability of feature attributes view improved (#862)
* Support for colors in attributes view (#857)
* Critical and major bugs _introduced_ with this version
  * T-wise configuration generation with ICPL and Chvatal does not work anymore (#983)

### Release 3.6.0 (August 2019) 
* Increased required Java version to 1.8
* New constraint view added listing cross-tree constraints
  * Filter of constraints based on selection in feature diagram
  * Filter based on keyword search
  * Pro tip: use hashtags in the constraint description to filter groups of constraints
* Improved feature diagram editor
  * Improved constraint editor functionality
  * Added additional tree layouts for feature diagram editor
  * Added TikZ (Latex) export for feature diagrams
  * Improved legend behavior (#603)
  * Improved/Fixed UI (#787, #802, #804 #806, #809, #821, #827, #845, #884)
* Improved configuration editor
  * Added proper error page
  * Improved handling for conflicting configurations due to feature model changes (#678)
  * Revised internal job handling
* Revised feature model format
  * Integrated graphical information for feature model
  * Removed separated file for storing graphical information of feature model
* Improved ant build scripts for fm.core and fm.attributes library and added readme.md files.
  * Added support for building fm.core library with maven (experimental)
* Improved configuration generators
  * Moved configuration generators to fm.core plug-in (also available in fm.core library)
  * Added new t-wise configuration generator (experimental)
  * Added new uniform random configuration generator (experimental)
  * Added testing and statistic tool for configuration generators (experimental)
* Revised/Refactored several classes
  * Added new framework for handling SAT problems and SAT solvers 
  * Revised feature model analyses and configuration analyses
  * Revised internal file handling for feature models and configurations
  * Revised handling and loading of extension (e.g. file formats)
  * Replaced some interfaces with standard functional interfaces of Java 1.8
  * Removed several deprecated classes and methods
* Fixed several issues regarding:
  * Configuration editor (#882)
  * Feature model edits view (#408)
  * Feature attribute view (#863)
  * Configuration map (#867)
  * Obfuscated feature model export (#877)
  * Editing color scheme (#890)
  * Configuration format (#764, #783)
  * DIMACS format (#764, #868, #869)
  * GUIDSL format (#871)
  * Extended feature model format (feature model attributes) (#855, #876)
* Critical and major bugs _introduced_ with this version
  * Feature attributes cannot be updated (#903)
  * Configuration editor requires minutes after every click (#907)
  * Wrong explanations for feature-model defects (#905, #906)
  * No default configuration selected when loading FeatureIDE example (#911)
  * Export of feature dependency information does not work anymore (#931)
  * Performance problem when storing feature model for projects with may configurations (#1011)
  * Computation and highlighting of implicit constraints fails (#920, #946)

### Release 3.5.5 (June 2019)
* Hotfix containing only stability improvements over v3.5.4
* Added example called FeatureModelAnalysis to illustrate how to analyze a feature model with the FeatureIDE library
* Numerous fixes for the framework composer (#779)
* Non-terminating builds prevented for AspectJ and framework projects (#826)
* Wrong number of false-optional features fixed in the statistics view (#832)
* Warning added to indicate that the calculated number of program variants in the statistics view could be incorrect in the presence of indeterminate hidden features (#741)
* Examples illustrating extended feature models have been improved (#866)
* Horizontal scrollbars added for the configuration map (#861)
* Action in feature diagram restored: Show Hidden Dependencies of Submodel (#875)
* Performance when editing extended feature models improved (#837)
* Fixed incompatibility with Eclipse 2018-12 and newer versions (#852)

### Release 3.5.4 (February 2019)
* Hotfix containing only stability improvements over v3.5.3
* Usability and stability of the feature attributes view improved (#847, #853, #856)
* Performance and appearance of the feature diagram improved (#785, #831)
* Fixed a bug due to which feature models have not been cloned properly (#859)
* Fixed compilation problems with JavaDoc (#748)
* Removed instable editing functionality in the feature model outline (#760)

### Release 3.5.3 (November 2018)
* Hotfix containing only stability improvements over v3.5.2
* Numerous issues with the FeatureHouse composer (#794)
* Improvements for execution of JUnit tests (#814, #819)
* Illegal feature names in extended feature models after Eclipse restart (#833)
* Removal of attributes when features are moved in the diagram (#829)
* Improved layouting of feature models (#825)
* Accidential change of siblings order (#803)
* All kinds of void feature models supported when editing constraints (#823)

### Release 3.5.2 (September 2018)
* Hotfix containing only stability improvements over v3.5.1
* Improved loading and saving of feature models (#759, #761, #771, #773, #776, #799)
* Better performance for feature models with large contraints (#780)
* Configuration only marked as invalid if the feature model is not void (#797)
* FeatureIDE library improved (#807)
* Mac users find a README in the prepackaged Eclipse when having trouble running unsigned code (#801)
* Numerous further issues fixed: https://github.com/FeatureIDE/FeatureIDE/milestone/26?closed=1

### Release 3.5.1 (June 2018)
* Hotfix containing only stability improvements over v3.5.0
* Better performance for analyses in constraint dialog (#736)
* Unused and false-optional features renamed to never-selected and always-selected features to avoid confusion (#705)
* Example projects added for extended feature models (#756)
* Numerous further issues fixed: https://github.com/FeatureIDE/FeatureIDE/milestone/25?closed=1

### Release 3.5.0 (April 2018)
* Feature attributes can be defined with new view and stored in new format for extended feature models (#255, #650)
* New library without Eclipse dependencies for extended feature models (#714)
* New tool bar and revised context menu for feature diagrams (#648, #651, #672, #720)
* New notation for dead and false-optional features to avoid confusion with feature coloring (#649)
* Descriptions for cross-tree constraints (#648)
* Obfuscator for names in feature models (#667)
* Added examples with real-world configurations, namely Agrib and Profile (#606)
* Added examples for the FeatureIDE library (#664)
* Wizards for feature models and constraints available when installing only feature modeling (#649)
* Feature order can be changed by drag and drop (#649)
* Improved performance of readers and writers for XML and DIMACS formats (#695)
* Unified dialogs for importing and exporting feature models from/to different formats
* Fixed problems:
  * saving of feature models (#537, #591, #662, #677, #700)
  * layouting after renaming features (#604, #612)
  * wrong number of variants (#722)
  * impossible feature coloring (#708)
  * editing of redundant constraints (#622)

### Release 3.4.3 (February 2018)
* Hotfix containing only stability improvements over v3.4.2
* Void feature model detected in constraint dialog (#704) and correctly visualized in feature diagram (#681, #687, #484)
* Project explorer shows traces to all features (#593) and is refreshed if color scheme is deactived (#592)
* Renaming of features in configurations is fixed (#685) and tool tips disappear on Mac (#701)
* New configuration format more concise (does not store undefined features anymore) (#683)
* Markers for inconsistent mappings in Antenna projects fixed (#673)
* Feature interaction when collapsing explanations in feature diagram fixed (#682)
* Exceptions for feature diagrams (#703) and FeatureHouse projects (#680) fixed

### Release 3.4.2 (December 2017)
* Hotfix containing only stability improvements over v3.4.1
* Feature models created with v3.3.0 and v3.3.1 are correctly loaded (some or-groups we automatically transformed into mandatory features)
* Fixed problems: missing markers for invalid configurations, opening multiple configurations in project explorer
* Usability of feature diagram improved

### Release 3.4.1 (October 2017)
* Hotfix containing only stability improvements over v3.4.0
* Removed dependency from feature modeling to FeatureIDE
* Numerous fixes with respect to new configuration format
* Improvements for feature-model editor, configuration editor, explanations, and product generation

### Release 3.4.0 (September 2017)
* All feature diagram anomalies can be explained now (based on SAT4J's minimal unsatisfiable subset computation) 
* Visual explanations for feature diagrams improved
* XML format is used as default for new configurations (storing manual and automatic selection and deselection of concrete and abstract features)
* Configuration editor restores unchanged selection state when opened if configuration is saved in XML format
* Outline view for feature models available if only feature modeling is installed
* Numerous stability and performance improvements

### Release 3.3.2 (July 2017)
* Hotfix containing merely stability improvements over v3.3.1
* Improvements for FeatureIDE examples, feature-model editor, configuration editor, feature coloring, black-box frameworks, configuration map

### Release 3.3.1 (May 2017)
* Hotfix containing only stability improvements over v3.3.0
* Improvements for configuration editor, feature-model editor, configuration map, random and t-wise configuration generation

### Release 3.3.0 (April 2017)
* Feature subtrees in feature diagram can be folded manually and automatically
* Visual explanations for feature-model defects (e.g., dead features)
* New view Configuration Map added for an overview on all user-defined configurations
* New visualizations on feature usage in configurations added (e.g., feature relations graph)
* Added new XML format to store configurations (including selection states of abstract features)
* New short cuts added for feature diagrams
* Improved usability of collaboration diagram, statistics view and colors in all views
* Improved performance for explanations on feature-diagram defects
* Improved feature-model slicing
* Improved FeatureIDE library and its build scripts

### Release 3.2.0 (December 2016)
* Refactored main FeatureIDE functionality into Jar without dependencies to Eclipse
* New visualizations on the selection of features across configurations
* Improved performance for analysis of dead and false-optional features
* Improved warnings for unused and false-optional features and quick fix to create configurations automatically
* Content assist for annotations improved for preprocessor Antenna
* Improvements for product generation (to create and build products in batch mode)

### Release 3.1.2 (October 2016)
* (Release used for FeatureIDE tutorial at SPLC in Beijing, China)
* Hotfix for product generation under Unix operating systems

### Release 3.1.1 (September 2016)
* Several hotfixes regarding:
  * Example wizard and example projects (#393, #399)
  * Feature model editor and constraint dialog (#383, #389, #404, #406, #409, #420, #422)
  * Source code editor (#397, #402, #410)
  * Collaboration diagram (#395, #397)
  * Product generation (#384, #385, #413, #416)
* Added warnings in "New Source File" Dialog (#256)
* Added Automotive examples (large-scale feature models)
* Further stability improvements

### Release 3.1.0 (July 2016)
* New extension point to exchange classes for features, constraints, and feature models with the factory pattern
* Explanations for anomalies in feature models
* Support to compute implicit constraints for subtrees of the feature model
* Export for feature models to the FAMA format
* Algorithm to refactor complex constraints (e.g., A or B) into simple requires and excludes constraints
* Several fixes for feature-model analysis, configuration checking, and legend of feature diagrams
* Improved tool support for multi-product lines
* Example wizard revised and new examples added

### Release 3.0.1 (May 2016)
* Several Hotfixes:
  * Configuration is updated when opening configuration editor (Fix #345).
  * Feature model layout is saved properly (Fix #346).
  * Changes in feature model editor trigger outline refresh.
  * Feature models from outside the workspace can be save properly.
* Further stability improvements

### Release 3.0.0 (April 2016)
* Three new generators added for black-box frameworks, runtime parameters, and images
* New interfaces for feature model, features, and constraints to improve extensibility (new extension points are planned for 3.1.0)
* Improved performance for feature-model analyses and example wizard
* Statistics on feature models added in statistics view
* Usability improvements in feature-model editor
* Usability improvements in configuration editor (e.g., search, folding, revised highlighting)
* Feature-model slicing available

### Release 2.7.5 (December 2015)
* Support for coloring features in project explorer, feature diagram, configuration, outline, collaboration diagram, and for generated files
* Fixed wrong statistics for preprocessors
* New functionality in outline for preprocessor Munge
* Improved consistency of nomenclature used in menus
* Improved short cuts of feature model editor
* Fixed several bugs and null pointers

### Release 2.7.4 (June 2015)
* Improved outline with support for further langauges (Haskell, C#), nested classes, and with new filters
* Improved collaboration diagram with support for nested classes, new filters, and toolbar buttons
* Improved statistics view with LOC, support for nested classes, and jump-to-file actions
* Performance of automated analyses in the feature model editor improved (e.g., new calculation of dead and core features)
* Update problem with feature-model legend and constraints fixed (e.g., wrong highlighting of redundant constraints)
* Feature model outline revised

### Release 2.7.3 (March 2015)
* Performance and appearance of constraint dialog for large feature models improved (automated analyses run asynchronously)
* Performance of configuration editor for large feature models improved (automated analyses run asynchronously)
* Improved support for multi product lines
* Error propagation when generating multiple products (e.g., all products, all user-defined configurations, t-wise sampling)
* Improved support for undo and redo in feature model editor
* Added more restrictions to feature names in favor of stability (please report to us, if legacy FeatureIDE projects can no longer be built)
* Deprecated action framework of Eclipse replaced
* FeatureIDE requires Java 1.7 (was Java 1.6 before)

### Release 2.7.2 (October 2014)
* Support for Android projects with preprocessor Munge
* Family-based type checks with Fuji can be activated on demand (to overcome performance problems with large projects)
* Feature-model import from S.P.L.O.T. improved (can deal with several group types)
* Problems with preprocessor Antenna fixed
* Manual layout of and search for features in feature diagram with keyboard
* Graphical export of feature diagrams to SVG

### Release 2.7.1 (July 2014)
* Example wizard improved by hierarchical structure and keyword search
* Removed redundant calculations in composers that caused inconsistencies in threads
* Performance of configuration editor improved

### Release 2.7.0 (April 2014)
* Advanced support for contracts in FeatureHouse projects (e.g., collaboration diagram and outline, error markers, statistics on contracts, improved variability encoding)
* Performance of feature-model editor and analyses improved
* New support for prioritizing products in t-wise generation

### Release 2.6.7 (October 2013)
* New view calculating statistics on FeatureIDE projects
* New outline and content assist for FeatureHouse projects added
* Colligens supports development with CPP (integrates TypeChef)
* Feature model editor improved
  * Feature descriptions can be edited using a new dialog
  * Automated analyses optimized
* Configuration editor improved
  * Icons and tool tips added giving relevant information on the feature model

### Release 2.6.6 (September 2013)
* Family-based type checks of FeatureHouse projects fith fuji
* T-wise product generation with splcatool

### Release 2.6.5 (May 2013)
* New AHEAD version integrated
* AHEAD projects can be composed with Jampack or Mixin (based on the settings
  in the project properties)
* New DeltaJ version integrated (now available for Eclipse 3.7 and 4.2, was
  only available for 3.6 before)
* Support for metaproduct generation for FeatureHouse projects
* Support for JML-based verification with KeY and JavaPathFinder
* JML contracts added to the collaboration diagram for FeatureHouse projects

### Release 2.6.4 (December 2012)
* Support for JML in FeatureHouse (contract composition can be configured using
  right click on a FeatureIDE project -> Properties -> FeatureIDE -> Feature
  Project -> Contract composition)
* Syntax errors for JML in FeatureHouse projects

### Release 2.6.3 (September 2012)
* Support for arbitrary feature names in feature diagram and constraint dialog
  (features containing whitespace must be placed within quotation marks in the
  constraint dialog; works only when no generator is selected for this project)
* Enhanced removal of features that occur in cross-tree constraints (feature
  references in constraints are replaced by other features if possible)
* Warnings for indeterminate hidden features (a hidden feature H is
  indeterminate if there is no constraint A <=> H, where A is a conjunction of
  non-hidden features and there is no logically equivalent non-hidden feature
  that can be used to determine the selection of H)
* Enhanced collaboration diagram with support for printing, showing 
  methods/fields
* Support for colors in Antenna and Munge projects as known from
  FeatureCommander
* Detection of contradictions and tautologies in preprocessor directives for
  Antenna and Munge
* Efficiency of feature diagram drawing improved
       
### Release 2.6.2 (June 2012)
* Jak editor for AHEAD replaced with default Java editor

### Release 2.6.1 (March 2012)
* New layout algorithms and manual layout at the feature model editor (right
  click at the feature diagram -> Set Layout)
* Automated analysis at the feature model editor (highlighting of dead and
  false-optional features)
* Preprocessor Antenna integrated as a new generator
* FeatureIDE outline as a new view showing also the methods of other roles
* Outline view for the feature model (better scalability for large models)
* Automatic conversion of FeatureIDE projects from AHEAD to FeatureHouse (right
  click on a FeatureIDE/AHEAD project -> Change composer to FeatureHouse) 
* Property page for feature model editor to change appearance of the feature
  diagram (right click on a FeatureIDE project -> Properties -> FeatureIDE -> 
  Feature Model Editor)
* Property page for FeatureIDE projects to change directories or the generator
  (right click on a FeatureIDE project -> Properties -> FeatureIDE -> Feature
  Project)
* A new option to create FeatureIDE projects without generator for feature
  modeling only

### Release 2.6.0 (September 2011)
* Support for redo and undo at the feature model editor
* Option to generate all products (right click on a FeatureIDE project ->
  Variant Builder)
* Error propagation for some languages of FeatureHouse

### Release 2.5.2 (June 2011)
* Collaboration diagram supports further languages in FeatureHouse

### Release 2.5.1 (March 2011)
* Warnings at feature folders indicating whether a feature is not implemented 
  (potentially abstract feature) or does not exist
* DeltaJ integrated as a new generator
* AspectJ integrated as a new generator
* Legend added at the feature model editor
* Simple implementation of a collaboration diagram for preprocessors
* Methods and fields are shown at collaboration diagram for FeatureHouse and FeatureC++

### Release 2.5.0 (December 2010)
* Any Eclipse project can be converted to a FeatureIDE project (right click on
  a project that is not a FeatureIDE project -> Add FeatureIDE nature)
* FeatureIDE projects can be run using "Run as" of the host language (e.g., as 
  "Java application")
* A generic wizard to create new FeatureIDE source files (New -> FeatureIDE
  file)
* A generic composer encapsulating composer-specific code into plug-ins
  (composer integration is easier and does not involve redundant effort)
* Munge preprocessor integrated as a new generator

### Release 2.4.4 (September 2010)
* Features can be marked as hidden at the feature model (indicating that they
  are not visible at the configuration editor)

### Release 2.4.3 (August 2010)
* Editor to create cross-tree constraints improved
* New XML format to store feature models with support for abstract features
* Editor for configurations is now a multi-page editor (including a source page
  and a simple editor)
* Features in the configuration editor are highlighted if their selection or
  elimination leads to a valid configuration
* Collaboration diagram shows method and fields

### Release 2.4.2 (May 2010)
* Clean build is supported for FeatureIDE projects

### Release 2.4.1 (March 2010)
* Configuration editor synchronized with feature model editor (you do not need
  to close and reopen the configuration editor when changing the feature model)

### Release 2.4.0 (February 2010)
* Collaboration diagram added as a new view

### Release 2.3.5 (November 2009)
* Keyboard shortcuts for the feature model editor

### Release 2.3.4 (September 2009)

### Release 2.3.3 (August 2009)
* Editor for feature order as part of the feature model editor

### Release 2.3.2 (July 2009)
* Feature order can be specified

### Release 2.3.1 (June 2009)

### Release 2.3.0 icse (June 2009)
* Welcome screen
* FeatureIDE perspective
* Edit view enhanced (shows added and removed products)