| Offer |
An offer to transfer some rights to an item or to provide a service — for example, an offer to sell tickets to an event, to rent the DVD of a movie, to stream a TV show over the internet, to repair... |
| Demand |
A demand entity represents the public, not necessarily binding, not necessarily exclusive, announcement by an organization or person to seek a certain type of goods or services. For describing dema... |
| ProductCollection |
A set of products (either ProductGroups or specific variants) that are listed together e.g. in an Offer. |