The invention relates to a sample chamber with a cover plate and a bottom plate which is joined thereto in a fixed manner, wherein a recess is provided in the cover plate so that a reservoir is formed by the bottom plate, wherein a planar element with holes is provided in the reservoir, wherein the holes have a predetermined arrangement andor size. The message service method receives a message and a message transmission request from an open service application user and transmits the message to an appropriate transmission infrastructure such that the message arrives at a destination terminal. The extracted attributes are saved in storage wherein the storage is optionally an annotation store.