The table below and its link describe all of the variables included in the system and how they are organized into tables. This gives the variable names used in the system, the definitions and the units.

Code	Title	Function
PLCHR##	Play Characteristics	Main Play Characteristics - Discovered and Undiscovered
PLODSC##	Play Oil Discovery History Table	Oil Discovery History by Play
PLGDSC##	Play Gas Discovery History Table	Gas Discovery History by Play
PLWDSC##	Play Wide Discovery History Table	Discovery History by Play (Oil and Gas Combined)
PLADRL##	Play Annual Drilling History Table	Annual Number of Exploratory Wells/Year by Play
PLCDRL##	Play Cumulative Drilling History Table	Cumulative Number of Exploratory Wells/Year by Play
PLUVOL##	Play Undiscovered Total Volumes	Distributions on Total Volumes of Undiscovered Resources by Play
PLUSZ##	Play Undiscovered Field Size	Distributions on Sizes of Undiscovered Fields by Play
PRUVOL##	Province Undiscovered Total Volumes	Distribution of Total Volumes of Undiscovered Resources by Province
PRFLDS##	Province EIA Field Table	Listing of EIA Fields by County within a Province