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Class steward is Patient Care
Material can have many kinds of relationships with Stakeholders. We subsume all the relationships between material and stakeholders under the notion of Responsibility. The reason being that responsibility for the existence of material, any specific property of material, or performance of functional material (devices) is with some stakeholder. The underlying reason for stakeholder associations to material is that the material is somehow acted upon by the stakeholders. In that sense, one could subsume the Responsibility association under the Service action class. However, just as we chose to represent minor sub-activities around Services as Actors with various actor types, we allow the responsibilities that come from actions of stakeholders to be persistently "coined" on the material.
For example, manufacturing is certainly an activity (Service) with the manufacturer (Organization) as an Actor and the material as a Target of type product. However, in many cases we are not interested in the activity of manufacturing the material, when it took place and what its circumstances were, but what we are interested in is just: who made it? This interest in the manufacturer is chiefly one of responsibility and liability: if the material is different than expected, does not perform well, or does harm, one would probably consider holding the manufacturer liable. Responsibility and liability are concepts that form the very basis of a society based on the law, and emphasis on those terms should by no means imply an undue "legalization" of relationships.
Other relationship types between Material and Stakeholder are: owner, distributor, custodian/holder. All those relationships can be considered to be characterized by responsibilities. This even goes so far as if a human fetus would be considered Material, motherhood (and fatherhood!) would be a type of Responsibility between a Stakeholder (Person) and that fetus. This example shows that responsibility has two aspects: responsibility is not only being held liable by others for malfunctioning, disappointment, and harm caused by the material; responsibility also means an ethical responsibility towards the "material" and even to the extent of being held liable by society for neglect of one’s responsibility towards that "material." This latter kind of responsibility is clearly present between fetus and parent, but also between animal and owner or custodian.
The same piece of material may be given different identifiers by different responsible parties. For example, a manufacturer may assign a manufacturer id, a distributor may assign a catalog number, etc. All those identifiers can in principle occur under the Material.id attribute, i.e., as a property of the material itself. However, this attribute allows to make the scope of the id more clear, i.e. it helps to easily distinguish a specific manufacturer’s id from a distributor’s id much more directly and obvious as can be done using the assigning authority component of the instance identifier data type.
Allows to specify a limitation in time during which the responsibility holds.
Specifies the kind of responsibility of the Stakeholder to the Material.
Concept Implies Code Definition manufacturer MAN Someone bringing a specific material instance into existence, or, if the material is not a specific instance, someone capable of doing so. distributor DST Someone distributing material between a manufacturer and a buyer or retailer. retailer distributor RET Someone selling a material, also giving advice to prospective buyers. transporter TRP Someone in transient possession of a material for the purpose of relocating it. owner OWN Someone to whom law grants the right to call a material his own, which entitles him to make decisions about the disposition of that material. holder HLD Someone who is currently in possession of the material, who holds, or uses it, usually based on some agreement with the owner. trainer TRN Of a companion animal, someone who is training the animal on behalf of the animal’s owner. parent PRN One of the two direct ancestors of a human fetus, in case a fetus is not considered a person. father parent FTH The male parent of a human fetus, in case a fetus is not considered a person. mother parent MTH The female parent of a human fetus, in case a fetus is not considered a person.