Additional Common Attributes
While these attributes are not members of the
CoreAttributes enum, they are de facto standards across the system and found on most FlowFiles.
File Size (
fileSize): The size of the FlowFile content in bytes.
Entry Date (
entryDate): The date and time at which the FlowFile entered the system (i.e., was created). The value of this attribute is a number that represents the number of milliseconds since midnight, Jan. 1, 1970 (UTC).
Lineage Start Date (
lineageStartDate): Any time that a FlowFile is cloned, merged, or split, this results in a "child" FlowFile being created. As those children are then cloned, merged, or split, a chain of ancestors is built. This value represents the date and time at which the oldest ancestor entered the system. Another way to think about this is that this attribute represents the latency of the FlowFile through the system. The value is a number that represents the number of milliseconds since midnight, Jan. 1, 1970 (UTC).