Alexei Lavrentiev is a research engineer at ICAR Research Laboratory (CNRS and Lyon University). His PhD thesis in French Linguistics (École normale supérieure de Lyon, France, 2009) was dedicated to the study of medieval French punctuation and was based on a corpus of multi-layer TEI-XML transcriptions of manuscripts and incunabula. He was involved in the Princeton Charrette Project (2002-2006) and in the Saint-Petersburg Hagiography Corpus (2004). Since 2004 he has been working on the BFM Old French Corpus and on various related research and publication projects. He is responsible for the TEI encoding of the BFM texts, for their linguistic annotation and for providing user access to them. He manages the BFM public website and the new web portal for text query and analysis. He is a co-editor (with Christiane Marchello-Nizia) of the Queste del Saint Graal online edition. The opening of the TXM-based BFM web portal in 2012 represents a major achievement in the BFM project. This portal, developed by a team of ICAR researchers and engineers (Matthieu Decorde, Céline Guillot, Serge Heiden, Alexei Lavrentiev and Bénédicte Pincemin), provides a great number of services including KWIC concordances, a text selection interface, presentation of synoptic editions, statistical analysis, etc.