In the domain of the platform economy we identified two gaps in the current literature. First the lack of a shared conceptualisation of digital platform types. We solve this issue with a taxonomy giving an overview of digital platform attributes, with attribute values expressing the possible variations between platforms depending on their type. These attributes and attribute values are then used in the typology giving a clear overview of all the digital platform types and how they are related to each other. The second gap is the lack of knowledge concerning the software functionalities of digital platforms. We contribute to this with a proposal of a reference ontology allowing for a better communication between developers and other stakeholders. Our envisioned ontology can be used as a common language that all platform stakeholders can understand to facilitate future research and support ontology-driven development of digital platforms.