Please do not tag additional questions onto old questions. Also note this forum is for SAS programming, not discussions of CDISC modelling. ... View more

Have you tried searching the CDISC Wiki site?   https://wiki.cdisc.org/ ... View more

This is a SAS software forum.  For CDISC related questions refer to the CDISC website, including the Implementation Guide: https://www.cdisc.org/standards/foundational/sdtmig     ... View more

@sharathbairoju The information you're looking for is CDISC related, not SAS specific, so although you may be lucky enough to find someone who knows the answer, this isn't likely the best place. I assume that CDISC and the FDA put out fairly detailed documentation about the requirements though.    I'm assuming you'll find that information here, but I can't be certain.    https://www.cdisc.org/FDA-Final-Binding-Guidance-on-Standards   @sharathbairoju wrote: can any one tell me the exact difference between RFSTDTC AND RFXSTDTC, RFENDTC AND RFXENDTC?HOW TO DERIVE THEM?   ... View more