Content Revisioning

Target release
User Story	SWIK-188 - Getting issue details... STATUS
Document status	DRAFT
Document owner	Marios Meimaris
Designer	Christos Pateritsas
Developers	Marios Meimaris
QA
Work Package & deliverables	SWIK-169 - Getting issue details... STATUS

Summary

Support multi-level versioning (i.e., revisions of decks, slides, questions etc.), and allow branching/forking of decks. Support computation of diffs between item (deck, slide etc.) revisions, and merging between different branches.

This is a critical feature of the platform that will enable:

Versions of decks and slides (and minor content items such as questions)
Branches of decks that result in autonomous published decks or concurrent development of content
Merging of different branches
Smart diff algorithms to detect and compare changes

Revisioning is done on different and independent levels (e.g. changes in a slide create a new slide revision, but not a new deck revision of the slide's container deck)
Branching is allowed only on decks
Branching a deck results in recursive copying of its contents in the new branch
For slides, every change performed in metadata and/or content implicitly results in new slide revision
For decks, every change performed in metadata, content appearance (e.g. new slides appear), content ordering, implicitly results in new deck revision

#	Title	User Story
1	Revision of deck	I want the changes on a deck to be logged as a new deck version, so that I can keep the history.
2	Revision of slide	I want the changes on a slide to be logged as a new slide version, so that I can keep the history.
3	Branch of deck	I want to be able to explicitly create a new branch from a deck.
4	Merging	I want to merge different branches of a deck into one branch.
5	Diff	I want to be able to compute and see the differences/changes between versions of decks/slides in a meaningful way.
6	Multilinguality

Below is a list of questions to be addressed as a result of this requirements document:

Question	Asked by	Outcome

Feature	Status