By fundamental categories The historically influential substance-attribute ontology is a polycategorical theory. It says that reality is at its most fundamental level made up of unanalyzable substances that are characterized by universals, such as the properties an individual substance has or relations that exist between substances. The closely related to substratum theory says that each concrete object is made up of properties and a substratum. The difference is that the substratum is not characterized by properties: it is a featureless or bare particular that merely supports the properties.
by fundamental categories the historically influential substance-attribute ontology is a polycategorical theory it says that reality is at its most fundamental level made up of unanalyzable substances that are characterized by universals such as the properties an individual substance has or relations that exist between substances the closely related to substratum theory says that each concrete object is made up of properties and a substratum the difference is that the substratum is not characterized by properties it is a featureless or bare particular that merely supports the properties