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commit 82e46674c67bc12424ff53f4232fab9762c2cf97
Author: Andrew Lim <>
AuthorDate: Thu Feb 6 14:17:39 2020 -0500

    NIFI-7075 Add missing FlowFile core attributes to Developer Guide (#4030)
    Signed-off-by: Andy LoPresto <>
 nifi-docs/src/main/asciidoc/developer-guide.adoc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/nifi-docs/src/main/asciidoc/developer-guide.adoc 
index c0c98df..2a2c93c 100644
--- a/nifi-docs/src/main/asciidoc/developer-guide.adoc
+++ b/nifi-docs/src/main/asciidoc/developer-guide.adoc
@@ -132,12 +132,18 @@ attribute within the `CoreAttributes` enum.
 - Filename ("filename"): The filename of the FlowFile. The filename should not 
contain any directory structure.
+- File Size ("fileSize"): The file size of the FlowFile in bytes.
 - UUID ("uuid"): A Universally Unique Identifier assigned to this FlowFile 
that distinguishes the FlowFile from other FlowFiles in the system.
 - Path ("path"): The FlowFile's path indicates the relative directory to which 
a FlowFile belongs and does not contain the filename.
 - Absolute Path ("absolute.path"): The FlowFile's absolute path indicates the 
absolute directory to which a FlowFile belongs and does not contain the 
+- 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 millis [...]
 - Priority ("priority"): A numeric value indicating the FlowFile priority.
 - MIME Type ("mime.type"): The MIME Type of this FlowFile.

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