RT Journal Article T1 Bousi-Prolog: Design and Implementation of a Proximity-based Fuzzy Logic Programming Language A1 Julián-Iranzo, Pascual A1 Sáenz Pérez, Fernando AB The fuzzy logic programming language Bousi∼Prolog extends Prolog with a weak unification algorithm based on proximity relations and truth degree annotations. The weak unification algorithm makes the search for answers more flexible, while rule annotations make possible knowledge-based applications where the rules may be uncertain. In this paper, after recalling the main concepts supporting this language, we detail its design and implementation. We describe the implementation of its operational semantics, which is based on compiling programs and queries into Prolog, and those important features that makes it more applicable: fuzzy sets, integration with WordNet and efficiency techniques. The result is a high-level open-source implementation of the Bousi∼Prolog system, written on top of SWI-Prolog, and publicly available. We also summarise some experiments measuring its performance compared to other systems. PB Expert Systems with Applications YR 2023 FD 2023 LK https://hdl.handle.net/20.500.14352/114026 UL https://hdl.handle.net/20.500.14352/114026 LA eng NO P. Julián-Iranzo and F. Sáenz-Pérez, "Bousi~Prolog: Design and implementation of a proximity-based fuzzy logic programming language", Expert Systems with Applications, Volume 213, Part A, 2023. DOI 10.1016/j.eswa.2022.118858. DS Docta Complutense RD 17 abr 2025