Sources — Validation Logic
Primary institutional and standards-based references related to validation logic and rule evaluation in digital systems.
The following sources provide conceptual anchoring for terminology associated with rule evaluation, constraint validation, and verification processes in digital systems.
Normative Requirement Semantics
IETF RFC 2119 — Key Words for Use in RFCs to Indicate Requirement Levels
Defines normative requirement terminology (MUST, SHOULD, MAY) widely used in rule-based validation environments and protocol specifications.
IETF RFC 8174 — Ambiguity of Uppercase vs Lowercase in RFC 2119 Requirement Keywords
Clarifies interpretation rules for requirement keywords used across standards and technical validation frameworks.
Constraint Validation Context
WHATWG HTML Standard — Constraint Validation
Describes rule-based constraint validation used to determine whether system inputs satisfy defined conditions and acceptance criteria.
NIST SP 800-53 — Security and Privacy Controls for Information Systems and Organizations
Provides control and assessment structures relevant to verification, validation, and evaluation processes within digital systems.
Interpretation Boundary
These sources are listed for conceptual anchoring and terminology stabilization only. No regulatory mapping, certification interpretation, or implementation guidance is provided.