This Technical Report contains descriptions of and analyses of current practices on multimodal and other multibiometric fusion, including (as appropriate) references to more detailed descriptions. It also discusses the need for, and possible routes to, standardisation to support multibiometric systems. This Technical Report contains descriptions and explanations of high-level multibiometric concepts to aid in the explanation of multibiometric fusion approaches including multimodal, multiinstance, multisensorial, multialgorithmic, decision-level and score-level logic.