The part's creation time.

This field reflects the part's creation time (i.e., upload time), in milliseconds relative to the Unix epoch.

An MD5 hash of the part's contents.

This field reflects a hex-encoded MD5 hash of the part's contents, or empty string if such a hash is not available.

The number of the part.

This field specifies the number of the part. Must a be a value in the range 1 to 10000, inclusive.

A SHA1 hash of the part's contents.

This field reflects a hex-encoded SHA1 hash of the part's contents.

The part's size.

This field reflects the part's size, in bytes.