Release Date	Request Code	Change Type	NCI Code	CDISC Term Type	CDISC Codelist (Short Name)	CDISC Codelist (Long Name)	Change Summary	Original	New	Change Implementation Instructions
2023-06-30	CDISC-6070	Update	C139176	CDISC Definition	DTYPE	Derivation Type	Update CDISC Definition	A data derivation or imputation technique which sets the analysis value on the record to an estimation of a value based on extending a known sequence of values.	A data derivation or imputation technique which sets the analysis value on the record to an estimated or assumed value based on extending a known sequence of values. This category also includes conditionally branched questions where an actual response is imputed.