The attached archetype OBSERVATION.demo.v1.adl has been developed as a mechanism to explain some of the data types and constraints that are modelled. It is clearly an artificial artefact, with each datatype demonstrated and described. You can download it and view it within your Archetype Editor simultaneously, if you choose.
The STATE, EVENT and PROTOCOL models are also described.
Below is the HTML rendering of the same archetype within CKM with supportive annotations. In the Data of the archetype, each datatype is represented and described in the middle column; many with some supporting examples in the left column: