Open Orchestra allows to attach keywords to content or media. They describe the content and allow to manage it. In the keyword panel, you can create or destroy a keyword. If you use a NoSql database and you destroy a keyword, it will still stay in the content where it is used.
When you fill the meta data for a content or media, already created keyword can be chosen from a list.
Alternatively, you can create new ones using the
content list block and
media list by keyword provide a way to filter the contents and medias by keywords.