I will introduce a Version Control system for article component in Joomla! In a collaborating group, it is important to preventing overwriting each others changes. Version Control allows a group to revert a document to any past state, to compare any version and to see who made a particular change in the article.
There will be also a conflict resolver, that try to merge two articles if there is a modification on the same time or a lock system to avoid it. I will create the all the pages of the version control system and API to access the methods.