RT Report T1 Declarative Debugging of Maude Functional Modules A1 Caballero, Rafael A1 Martí Oliet, Narciso A1 Riesco Rodríguez, Adrián A1 Verdejo López, José Alberto AB We introduce a declarative debugger for Maude functional modules, which correspond to executable specifications in membership equational logic. First we describe the construction of appropriate debugging trees for oriented equational and membership inferences. These trees are obtained as the result of collapsing in proof trees all those nodes whose correction does not need any justification.Since Maude supports the reflective features in its underlying logic, it includes a predefined META-LEVEL module providing access to metalevel concepts such as specifications or computations as usual data. This allows us to generate and navigate the debugging tree of a Maude computation using operations in Maude itself. Even the user interface of the declarative debugger for Maude can be specified in Maude itself. We describe in detail this metalevel implementation of our tool. Finally, we include several extended examples to illustrate the use of the declarative debugger and its main features, such as two different strategies to traverse the debugging tree, use of a correct module to reduce the number of questions asked to the user, selection of trusted vs. suspicious statements by means of labels, and trusting of statements “on the fly.” YR 2007 FD 2007 LK https://hdl.handle.net/20.500.14352/56719 UL https://hdl.handle.net/20.500.14352/56719 LA eng DS Docta Complutense RD 8 abr 2025