The method according to the invention is capable of characterizing a variation in the speed of particles or agglomeration of particles, the particles, such as blood particles, being contained in a liquid. A method involves providing an initial XML document that and analyzing the XML document to identify the XML data structures in the document and generating a data framework that corresponds to the data structure of the XML document. When the shelf plate is held on the shelf supports, the locking member is locked to the concave portion.