1.3.1.2 Object Identifiers
The protocol uses object identifiers (OIDs) (1) as unique identifiers for several classes of objects, as specified in [X660] and [RFC3280] Appendix A. OIDs (1) are used to uniquely identify certificate templates that are available to the CA. Within a certificate, OIDs (1) are used to identify standard extensions, as specified in [RFC3280] section 4.2.1, and some nonstandard extensions.