Abstract. The object of this diploma thesis is the research and implementation of an application that manages MXML documents using relational databases and allows navigation in them through MXPath queries. Multidimensional-XML (MXML) is an extension of XML suitable for representing data that assume different facets under different contexts, which are determined by assigning values to a number of dimensions. In other words, MXML is suitable for representing multidimensional semistructured data, that is semistructured data the value and structure of which depend on the context. Similarly, Multidimensional-XPath (MXPath) query language is an extension of XPath, which is suitable for navigating in MXML documents and allows context-aware querying.