In this paper, we discuss possible Declarative 3D Use-Cases and Requirements. The origin of this position paper is a set of users' requirements, wants and needs collected as the initial part of a research project. We focused our investigations on the analysis of existing implementations of galleries/marketplaces of 3D objects. Our project is currently in its initial phase, therefore we cannot go further in the analysis of derived technical requirements and in the description of the design

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... However, some of the technical requirements can be directly available and understandable from the descriptions of the use cases, others can be topics for discussion for the workshop itself.