Currently @type queries on mixed values expect the developer to specify the type using Core's terminology. That may or may not be aligned with the programming language's terminology - e.g. a C# developer may not realize that C#'s decimal type corresponds to Decimal128 in Core or that Guid is uuid. Similarly to what we do for class/property remapping, we should allow SDKs to supply aliases for Core's data type names. This may also be exposed as a build-time configuration option as those aliases are likely to be static (at least for .NET).