35 Business management; commercial administration; office tasks; consulting, promotion, information, publicity and communication services for third parties, in particular concerning art, its market and auction sales; organising and holding of sales, in particular by auction, and related consulting including the organisation of exhibitions and fairs for commercial and advertising purposes; exploitation of public and private data, in particular on art and its market; computer file management and searching information in the said files as well as data compilation and systematisation in a central file such as a database, for third parties, in particular in the field of art and its market; advertising, marketing and public relations and consulting in these fields for third parties; business organisation and management consulting, in particular in the field of art and its market; commercial information agency; establishment and operation of databases, in particular in the field of art and its market