What is the OID for CRS ??

Hi, all, what is the exact OID for CRS? I know the OID for CMS, since it is
a id-smime-mod:

id-mod-cms OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549)
                                pkcs(1) pkcs-9(9) smime(16) modules(0) cms(1) }

so the CRS is something like:

id-mod-crs OBJECT IDENTIFIER ::= { id-mod ?? }

I can't find it anywhere in the smime-oids as in 
"http://www.imc.org/ietf-smime";.

Perhaps the OID table need to be updated a bit? :^)

        -- Chen Wang, netDox