Data Dictionary for CSV export

Field	Description	Example
sfm_id	SFM internal identifier for tweet	6114
created_at	UTC time when the tweet was created	2013-10-28T17:52:53Z
created_at_date	date in Excel-friendly format, MM/DD/YYYY	10/28/2013
twitter_id	Twitter identifier for the tweet	114749583439036416
screen_name	The screen name, handle, or alias that this user identifies themselves with. Screen_names are unique but subject to change.	NASA
followers_count	Number of followers this account had at the time the tweet was harvested	5158956
friends_count	Number of users this account is following at the time the tweet was harvested	202
retweet_count	Number of times the tweet has been retweeted at the time the tweet was harvested. If the tweet is a retweet AND the retweet was done using the Twitter retweet feature (i.e. is_reweet_strict = TRUE) the retweet_count reflects the retweet count for the original tweet. If the retweet was done by typing RT at the beginning (is_retweet_strict = FALSE) the retweet_count reflects retweets of the retweet.	185
hashtags	Hashtags which have been parsed out of the tweet text, separated by a comma and space	Mars, askNASA
in_reply_to_screen_name	If the tweet is a reply, the screen name of the original tweet's author	wiredscience
mentions	Other Twitter users mentioned in the text of the tweet, separated by comma and space.	@NASA_Airborne, @NASA_Ice
twitter_url	URL of the tweet. If the tweet is a retweet made using the Twitter retweet feature, the URL will redirect to the original tweet	http://twitter.com/NASA/status/394883921303056384 retweet redirecting to original tweet-- http://twitter.com/NASA/status/394875351894994944
is_retweet_strict	Tweet is a retweet of another tweet, using Twitter's retweet function.	FALSE
is_retweet	SFM's best guess at whether tweet is a retweet of another tweet; includes retweets accomplished using old-style method of placing RT in front of tweet	TRUE
text	The UTF-8 text of the tweet.	Observing Hurricane Raymond Lashing Western Mexico: Low pressure System 96E developed quickly over the... http://t.co/YpffdKVrgm
url1	First URL in text of tweet, as shortened by Twitter	http://t.co/WGJ9VmoKME
url1_expanded	Expanded version of URL; URL entered by user and displayed in Twitter. May itself be a user-shortened URL, e.g. from bit.ly. Further expansion available in sfm web interface, not in csv export.	http://instagram.com/p/gA_zQ5IaCz/
url2	Second URL in text of tweet, as shortened by Twitter.
url2_expanded	Expanded version of URL; URL entered by user and displayed in Twitter. May itself be a user-shortened URL, e.g. from bit.ly. Further expansion available in SFM web interface, not in csv export.

For more info about source tweet data, see Twitter API documentation, including: Tweets and Entities.