alleryStart learning →What does the taxonomy say about how many roles a single actor can perform?
AOne actor performs exactly one role
BOne actor can perform multiple roles
COne actor performs at most two roles
DOne actor performs no role by itself
Answer & Solution
Correct answer: B. One actor can perform multiple roles
1. The volume states it in four words: "One actor can perform multiple roles."
2. The reverse also holds, and the volume says so in the next sentence: "Likewise, a role can be played by multiple actors."
3. So the relationship is many-to-many with no cap in either direction, which is why any option naming a fixed limit is wrong.
4. The volume also notes that the taxonomy is fine-grained enough for this to matter: "Each activity in the taxonomy can be executed by a different actor."
5. This flexibility is what lets one reference architecture describe both a system built entirely inside one organisation and a system assembled from services supplied by several.
_Source: NIST SP 1500-2r2 "NIST Big Data Interoperability Framework: Volume 2, Big Data Taxonomies" (Nov 2019), p.6 section 2.1 "Actors and Roles"_
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