OpenActive.Net serialises the "kind" field for [slots ](https://github.com/openactive/OpenActive.NET/blob/master/OpenActive.NET/models/Slot.cs)as "Slot": https://github.com/openactive/OpenActive.NET/blob/b171a1c76184b6d69118483bd998dab3eea29907/OpenActive.NET/rpde/RDPEModels.cs#L47 https://github.com/openactive/OpenActive.NET/blob/b171a1c76184b6d69118483bd998dab3eea29907/OpenActive.NET/rpde/RDPEModels.cs#L338 (Though I must admit, I can't seem to find where this property is actually set?) However, the validator does not accept this type: Given [this array](https://validator.openactive.io/?version=2.0&validationMode=RPDEFeed#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) of items, this is the result; 
OpenActive.Net serialises the "kind" field for slots as "Slot":
https://github.com/openactive/OpenActive.NET/blob/b171a1c76184b6d69118483bd998dab3eea29907/OpenActive.NET/rpde/RDPEModels.cs#L47
https://github.com/openactive/OpenActive.NET/blob/b171a1c76184b6d69118483bd998dab3eea29907/OpenActive.NET/rpde/RDPEModels.cs#L338
(Though I must admit, I can't seem to find where this property is actually set?)
However, the validator does not accept this type:
Given this array of items, this is the result;