VO mode annotation syntax proposes a syntax to map VOTable data on any model serialized in VO-DML. Vodml-instance-vot annotations are grouped in a single XML block located in the resource head. The annota-tions operate as a bridge between the data and the model. It can denote the way data are connected to each other as well as dierent tables can be joined together. It is also able to carry data or meta-data that are missing in the VOTable. The annotation block is made of bricks that facilitate both annotation process and model instance reconstruction. it has been designed so as not to alter the original VOTable content, thus limiting its impact on legacy clients.