|Description||string||The date and time when the credential expires (and is not appropriate for use for authentication/ authorization). If this information is not applicable, Use a value of '99991231235959.999999+999', (1 microsecond before midnight, December 31, 9999 CE, at coordinated universal time + 999 minutes).
On CreateInstance, if this property is unspecified, or set to NULL, then a value of '99991231235959.999999+999' is assumed. Note that this property does not define how the expiration is set - but that there IS an expiration. The property may be set to either a specific date/time or an interval (calculated from the Issued datetime). For example, for Certificate Authority-signed public key, the expiration is determined by the CA. Another example is a voice mail password that expires 60 days after it is set/issued.
|Description||string||The date and time when the credential was issued. Use a value of all '00000101000000.000000+000', (midnight, January 1, 1 BCE at coordinated universal time +0 minutes), if this information is not applicable. On CreateInstance, if this property is unspecified, or set to NULL, then current time is assumed.