application domain
163600·updated Sep 1, 2026A grouping or bounded environment defined by the scope of a particular software application or set of applications, within which resources, data, functions, and access controls are managed under a common operational context. It is distinguished from a physical system boundary or an organizational boundary in that the boundary is drawn around application-layer functionality rather than hardware, network perimeters, or administrative units. In security and compliance practice — as seen in access-control and separation-of-duties analysis — it is used to name one of several non-coextensive planes across which a single policy violation (such as a privilege conflict) may need to be traced, underscoring that controls cannot be assessed in isolation within one system alone. Because violations such as separation-of-duty failures can span systems and application domains, organizations must consider the entirety of their systems and system components when developing such policies. The NIST CSRC glossary reinforces the compositional reading: "domain separation" is defined as "a partitioning of the inputs to different application domains so that no input is assigned to more than one domain," tr
Source
violations can span systems and application domains, organizations consider the entirety of their systems andthe sentence this term was read in
generalized from a web lookup of the quoted expression at proposal time Verdict: compositional.
- Protecting specified information in non-Government of Canada systems and organizations (ITSP.10.171) - Canadian Centre for Cyber Security
- Domain Separation - Glossary | CSRC
A definition generalized from search results is a draft to react to, not provenance. Confirm it against an authority document before this term is verified.
A web lookup ran when this term was proposed
A logical grouping defined by the scope or purpose of one or more software applications, used as a unit of analysis for policy, access control, and risk reasoning across an enterprise environment. It differs from a technical isolation construct (like an OS process or security domain) by functioning as an organizational or architectural boundary—one that human roles and workflows cross—rather than a hard enforcement boundary enforced by a kernel or hypervisor. In frameworks such as NIST SP 800-53, the term appears when policies governing duties, privileges, or information flows must be evaluated not just within a single system but across the full set of systems and application domains that together constitute a business process, because a violation or conflict may only be visible when the whole landscape is examined.
Advisory only. A term this product ships is defined by an authority document, not by a search result.
Proposed during multiword review of this document in the CKI mapping queue.
Attested in
Classifications
Entity Type
Sensitivity
Information Class
Variants
- plural
- application domains
- possessive
- application domain's
- pluralpossessive
- application domains'
Framework definitions
- §1 · attested_usage_reviewer_confirmed
- No definition is given in NIST SP 800-171r3. The term is attested in use at 1 citation in that document; a definition is pending curation.Increment 2: attested in 800-171r3 without a glossary definition.
- §1 · web_lookup_draft
- A grouping or bounded environment defined by the scope of a particular software application or set of applications, within which resources, data, functions, and access controls are managed under a common operational context. It is distinguished from a physical system boundary or an organizational boundary in that the boundary is drawn around application-layer functionality rather than hardware, network perimeters, or administrative units. In security and compliance practice — as seen in access-control and separation-of-duties analysis — it is used to name one of several non-coextensive planes across which a single policy violation (such as a privilege conflict) may need to be traced, underscoring that controls cannot be assessed in isolation within one system alone. Because violations such as separation-of-duty failures can span systems and application domains, organizations must consider the entirety of their systems and system components when developing such policies. The NIST CSRC glossary reinforces the compositional reading: "domain separation" is defined as "a partitioning of the inputs to different application domains so that no input is assigned to more than one domain," trDR-088 backfill from the noun definition column