This paper is a follow-up to our recent work, where we apply and extend the theory and methods of algorithmic correspondence theory previously developed for modal logics to the language ℒR of relevance logics with respect to their standard Routley-Meyer relational semantics. In the above mentioned precursor of the present work we develop a non-deterministic algorithmic procedure PEARL for computing first-order equivalents in terms of that semantics and proving canonicity of formulae of a language ℒR+ extending ℒR with all residuals and adjoints of the connectives in ℒR. We identified a large syntactically defined class of inductive formulae in ℒR, and showed that PEARL succeeds for every so defined inductive formula. In this work we present an alternative approach to defining inductive formulae for relevance logics, originally developed for polyadic modal logics in earlier works by Goranko and Vakarelov, based on a rewriting of the language ℒR that allows composing logical connectives into composite ‘box’ and ‘diamond’ terms that enable a ‘flat’ representation of formulae of ℒR, thus providing a technically simplified definition of the class of inductive formulae. We show that, modulo translation, the two approaches define the same class of inductive formulae, and explain how PEARL can be modified to work on ‘flat’ inductive formulae.