In this work we present STIA: a tool for semantic annotation in the Jurisprudence domain. The tool offers an easy interface to domain experts (lawyers, administrative, researchers, …) for annotating relationships of pertinence between portions of text from different laws covering similar topics/circumstances/events. These annotations either constitute a resource on their own (which can be used in the context of semantic search engines to improve retrieval of related laws) as well as a precious feed for tools aiming at automatically extracting more of the above relationships.