DEFINITION:<br/>An activity defined at a global library level that is an action of processing a material.<br/><br/>EXAMPLE(S):<br/>freezing, thawing, spinning, embedding, dividing, aliquot, adding additives or growth factors<br/><br/>OTHER NAME(S):<br/>product manipulation<br/><br/>NOTE(S):<br/>Material process may be performed on any kind of material, such as a specimen, nanomaterial, or biologic. The result of the process may be a similar or different kind of material, for instance a specimen may be the result of a specimen processing step (e.g., aliquot or division of a specimen), or alternatively a blood product has anticoagulants added to it to preserve the product. Other processing steps, such as adding growth factor to induce cell growth, may be performed on the blood product.<br/><br/>Note that DefinedMaterialProcessStep inherits two associations that perhaps should be mutually exclusive - 1) the association between a DefinedProcedure and a Product that it uses, and 2) the association between an Activity and an ExperimentalActivityItem that it uses.  <br/>Question for SMEs:  Should this be made a constraint on this class, or even on a higher level superclass?<br/>