Index is a generic property of type number that can indicate the index number of pretty much anything in different contexts. It is currently used for indexing:
- the Number characters;
- TSAB-administrated and non-administrated worlds for the list (see also Property:World status);
- anime episodes, Sound Stages, manga chapters, and game sequences;
- spells used by characters who number them (e.g. Isis Egret);
- AEC Armament model numbers.
Normally, only one value of this property should be specified per page.