sdtm_te.RdTrial Elements data frame - One record per planned Element
sdtm_tea data frame with 7 rows and 7 columns. See https://github.com/SafetyGraphics/safetyData/blob/main/data-raw/sdtm/README.md for more details and full data specification. Columns:
 STUDYID text - Study Identifier
 DOMAIN text - Domain Abbreviation
 ETCD text - Element Code
 ELEMENT text - Description of Element
 TESTRL text - Rule for Start of Element
 TEENRL text - Rule for End of Element
 TEDUR text - Planned Duration of Element