What is the General Instruction of the Roman Missal?
It is the handbook for how to celebrate the Mass. While it's not the only resource, most questions about the Mass can be answered with the help of the General Instruction of the Roman Missal.
It covers...
The General Instruction of the Roman Missal (GIRM), from the Roman Missal, Third Edition, seeks to promote more conscious, active and full participation of the faithful in the mystery of the Eucharist. The GIRM provides specific detail about each element of the Order of Mass...
First Ed