If you think there's broad utility for a particular derived query parameter, you can propose it for inclusion in the specification as well.
Stratigraphy is a branch of geology that studies rock strata with an emphasis on distribution, deposition, age and evidence of past life.
Is it possible to use a relative date or calculated value in either a search request or a subscription criteria?
This is especially necessary in subscription criteria, as the criteria value is saved in a resource.
I would like to be able to provide functionality like this: Subscribe to all patients where the patient is less than 2 years old. It's possible to define custom search criteria that involve some sort of calculation or inference on the part of the responding server, though obviously this increases the complexity for the server responding to the query.
Search for all patients that are over 65 years old. Once defined, these could be used for subscriptions as well.
Once Steno recognized that the fossils he was contemplating (sharks teeth and sea shells) were formed in the sediments of oceans he was able to work out the basic rules of stratigraphy.
Steno formalized the laws of superposition, original horizontality, original continuity and inclusions in his publication entitled states that any inclusion is older than the rock that contains it.Steno's idea that fossils are older than the rock in which they are found hints at this principle, but Hutton is most often given credit for this principle.states that fossil organisms succeed one another in a definite, irreversible, and determinable order.Relative dating not only determines which layers are older or younger, but also gives insight into the paleoenvironments that formed the particular sequence of rock.A chance encounter between determined fishermen and a great white shark off the Tuscan coast in 1666 sparked a chain of events that would help change humans views of fossils and Earth’s geologic past (Cutler 2003, pp. Nicolas Steno (1638-1686) dissected the head of this shark and realized fossil tongue stones believed to be petrified snake or dragon tongues were actually fossil shark teeth (Prothero 1998, p. One problem still existed, how do fossils become embedded in solid rock?Steno recognized that fossils represent organisms that became buried in sediment, which later turned into rock.The realization that sediments turn into rock was counter to the view that all rocks on Earth formed in a single creation event.