ENP-Regex - a Regular Expression Matcher Prototype for the Expressive Notation Package

In this paper we introduce ENP-regex, a prototype of a regular expression matcher developed for Expressive Notation Package (ENP). ENP-regex allows us to use the regular expression syntax to match against several score attributes, such as pitch and rhythm. Instead of writing the regular expression matcher from scratch we implement a scheme where a thin conversion layer is inserted between an existing Lisp-based regular expression library and ENP. The information sent from ENP to the regex matcher is transformed into a textual format. Similarly, the matches are converted into corresponding score objects. The benefit of the present implementation is that potentially the whole syntax of the regex matcher in question is at our disposal. We have implemented a prototype of the regular expression matcher. In this paper we present the current state of the system through examples.