2.1.3.7.4 Type: REV
RFC reference: [RFC2425] section 3.6.4.
vCard data format: REV:[Revision]
Brief description: Distinguishes the current revision of the information in the vCard from other renditions of the information.
Importing to and Exporting from Contact Objects
The REV type is imported to and exported from the PidTagLastModificationTime property ([MS-OXCMSG] section 2.2.2.2).