In the information retrieval (IR) domain a collection of documents is represented as a set of documents where cross references between documents are usually not taken into account in the querying process. This standard document model is not tailored to legal professional uses where the context of interpretation is crucial. Existing access tools do not take into account the complexity of references between legal documents. XML based standards have been created to facilitate access and management of legal data. Their exploitation for IR purposes offers new possibilities for advanced search techniques. In this work, we propose a novel approach allowing to exploit the XML standard formats of legal documents to query a collection of related documents and return relevant answers to the end-user. We consider exploiting at the same time the semantic content and the links between those documents. Answers are presented as graphs of documents with their links.