are groups of resources having certain properties in common and therefore put together as members of one concept. Dublin Core Classes are the terms of the DCMI Type Vocabularies - e.g. dcmitype:Collection, dcmitype:dataset, etc. Dublin Core also defined [
http://dublincore.org/documents/dcmi-terms/#H6 Classes as DCMI Metadata Terms] - e.g. dcterms:Agent, dcterms:BibliographicResource, etc. Relationships between Dublin Core Classes and Properties are the following:Each property may be related to one or more classes by a has domain relationship, where the domain indicates the class of resources that the property should be used to describe.; Each property may be related to one or more classes by a has range relationship, where the range indicates the class of resources that should be used as values for that property.; For further information about domains and ranges used with DCMI Properties see Domains and Ranges for DCMI Properties Source: Dublin Core