List all functions that are a standard presence in the language, where either:
- The function is part of the defined specification for the language. (A de jure component)
- The function is part of the definitive implementation for the language. (A de facto component)
- The function is common part of an implementation for the language (I.e. part of a library usually available)
If necessary, identify which condition(s) the function meets, or which standard it belongs to. Group functions by the above conditions.