File modification time stamp. Specifies the date/time the image and/or data files attached to this catalog record were last modified.
attribute::UseLastModified is set, the most recent of the
vignette::TimeStamp values of all materials and the vignette involved in the request is returned in the HTTP response as a last-modified header.
The actual file times of the image or data files attached to this catalog record are never used for this purpose.
catalog::TimeStamp is also used for catalog-based cache validation (see attribute::CacheValidationPolicy).
Date/time value in Java format. Can be either the integer number of milliseconds since midnight, January 1, 1970 UTC/GMT or a date/time string value with one of the following formats:
mm/ dd/ yyyy hh: mm: ss zzz
mm/ dd/ yyyy hh: mm: ss GMT offset
All elements of string formatted date/time values must be present. If the date/time value is not formatted correctly it is ignored and the modification time of the catalog.ini file is used instead.
attribute::TimeStamp is the field is empty or not present.