I'm not sure if this is a much-discussed topic online or not, but where can I go to learn about the hierarchy of church documents? I mean, I know that "it still applies unless it has been specifically changed in a later document," but really, some are more important than others.
Vatican II Constitutions?
Vatican II Decrees?
Vatican II Declarations?
Things put out by my country's bishops? (Music in Catholic Worship, Built of Living Stones...)
What about Musicam Sacram? (I tried googling "about musicam sacram," like maybe somewhere will tell me what IS this document, cuz I can quote it to my boss all I want, but he will still ask me what the document itself is...)
And what about pre-VII stuff? De Musica Sacra?