Does Datacom use Storage Protection Key 0?

Document ID : KB000120623
Last Modified Date : 12/11/2018
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Introduction:
z/OS uses 16 different Keys to allow/deny access to each 4Kb block of central storage.
Question:
Does CA Datacom use Storage Protection Key 0?
Environment:
CA Datacom/DB on z/OS
Answer:
CA Datacom mostly runs in Key 8 but briefly gets into Key 0 when needed and gets back into Key 8 promptly. One of the instances would be when using XCF. Also during COVERED VIRTUAL processing to name a few. 
Additional Information:
IBM Storage Protection Keys:
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.ieav200/iea3v2_Storage_protection.htm