The paper describes the design and implementation of an XML-based corpus environment for prosodically annotated data. The TASX-environment (TASX: Time Aligned Signal data eXchange format) constitutes the technical basis for a corpus designed to explore the acquisition of prosody by second language learners. It supports all aspects of the corpus setup procedure: XML-based annotation of the speech data, all transformation of non XML-annotations, and the web-based analysis and dissemination of the data.