Online Greek Coinage (OGC) is an online is a reference database intended to provide a systematized account of all types of coinage produced within its purview, and rooted in the digital world of the 21st century. It is intended to be readable by humans and machines. It will provide a classical typology of coin types online, identified by a series of stable http-addressable URIs for every distinct issue of Greek coinage. For these URIs will be provided basic descriptive information expressed in RDF. And for each issue, links will be provided to information about individual specimens of that issue. The Typology will seek to guarantee inclusion of specimens from a series of core collections (in major public institutions) and core resources (such as Sylloge Nummorum Graecorum and the Inventory of Greek Coin Hoards). Where possible and desirable it will also include information on specimens from non-core collections (including private collections), excavations and commerce.