# concept[].definition
create(type : string) - type is passed through to the application on the standard API, and must be known by it.

# concept[].definition
truncate(source, length) - source must be stringy type.

# concept[].definition
escape(source, fmt1, fmt2) - change source from one kind of escaping to another (plain, java, xml, json). note that this is for when the string itself is escaped.

# concept[].definition
cast(source, type?) - case source from one type to another. target type can be left as implicit if there is one and only one target type known.

# concept[].definition
append(source...) - source is element or string.

# concept[].definition
translate(source, uri_of_map) - use the translate operation.

# concept[].definition
reference(source : object) - return a string that references the provided tree properly.

# concept[].definition
Perform a date operation. *Parameters to be documented*.

# concept[].definition
Generate a random UUID (in lowercase). No Parameters.

# concept[].definition
Return the appropriate string to put in a reference that refers to the resource provided as a parameter.

# concept[].definition
Execute the supplied FHIRPath expression and use the value returned by that.

# concept[].definition
Create a CodeableConcept. Parameters = (text) or (system. Code[, display]).

# concept[].definition
Create a Coding. Parameters = (system. Code[, display]).

# concept[].definition
Create a quantity. Parameters = (text) or (value, unit, [system, code]) where text is the natural representation e.g. [comparator]value[space]unit.

# concept[].definition
Create an identifier. Parameters = (system, value[, type]) where type is a code from the identifier type value set.

# concept[].definition
Create a contact details. Parameters = (value) or (system, value). If no system is provided, the system should be inferred from the content of the value.