Silvio Peroni holds a Ph.D. degree in Computer Science and he is a post-doc at the University of Bologna. He is an expert in document markup and semantic descriptions of bibliographic entities using OWL ontologies. He is the Co-Director of the OpenCitations Project and one of the main developers of SPAR (Semantic Publishing and Referencing) Ontologies that permit RDF descriptions of bibliographic entities, citations, reference collections and library catalogues, the structural and rhetorical components of documents, and roles, statuses and workflows in publishing. Among his research interests are Semantic Web technologies, markup languages for complex documents, design patterns for digital documents and ontology modelling, and automatic processes of analysis and segmentation. In particular, his recent works concern the empirical analysis of the nature of citations, the study of visualisation and browsing interfaces for semantic data, and the development of ontologies to manage, integrate and query bibliographic information according to temporal and contextual constraints.