Material - Githubissues

Description of the issue or change request

1) Device hasConstructionMaterial Material, where Material is a subclass of 
PhysicalProperty.  So far, no properties are associated with Material, mainly 
because, as with other places in DevOnt, this is basically more a placeholder 
while more elaboration is done.  This issue is about how to actually capture 
materials for the devices.  

This can/should be done by referring to definitions in a suitable external 
ontology, for example the SWEET Substance ontology: 
http://sweet.jpl.nasa.gov/1.1/substance.owl

2) Also, should Material be a subclass of ValuedPhysicalProperty, that is, to 
be able to say that a certain device has a certain material with some value 
associated, presumably a percent of that material in the composition of the 
device?

Original issue reported on code.google.com by caru...@gmail.com on 22 Jun 2010 at 11:50

The material of a device shouldn't be expressed as a percent. For marine devices, it will normally be used to indicate the case or housing - plastic, titanium, or something in between - and/or some other critical part, like a ceramic thermister, maybe a copper guard (used to inhibit fouling) on a CTD. The variation in the way this may be used doesn't make it easy to model; do we need to get down to this level of detail, or can we assume it will be handled externally (for the time being)?

mmisw / devont

Material #23