1. In logic and formal systems, a rule governing the manipulation and transformation of formulas based on their structure rather than their content
The cut rule is a fundamental structural rule in sequent calculus.
A regra do corte é uma regra estrutural fundamental no cálculo de sequentes.
2. In linguistics, a rule that describes the formation and organization of sentences based on syntactic structure
Subject-verb agreement is a structural rule in English grammar.
A concordância sujeito-verbo é uma regra estrutural da gramática inglesa.
3. In architecture and engineering, principles governing how structural elements must be arranged and related
Building codes establish structural rules for earthquake resistance.
Os códigos de construção estabelecem regras estruturais para resistência a terremotos.