UMLS Active Release Download Discontinued with 2017AB
UMLS Active Release Download Discontinued with 2017AB. NLM Tech Bull. 2017 Jul-Aug;(417):b16.
August 30, 2017 [posted]
The National Library of Medicine (NLM) is ceasing production of the separate Active Release download for each Unified Medical Language System (UMLS) Release. This change is effective with the 2017AB Release in November 2017.
The Full Release includes the option to select the Active Subset during installation via MetamorphoSys. It is one of the options in the Default Subset Configuration window (see Figure 1). The Active Subset is equivalent to the Active Release.

Figure 1: MetamorphoSys Select Default Subset Configuration window.