fields property

A mapping from the positional location to the value.

The key string uses zero-based indexes separated by dots to identify Fields, components and sub-components. A bracket notation is also used to identify different instances of a repeated field. Regex for key: (\d+)([\d+])?(.\d+)?(.\d+)? Examples of (key, value) pairs: * (0.1, "hemoglobin") denotes that the first component of Field 0 has the value "hemoglobin". * (1.1.2, "CBC") denotes that the second sub-component of the first component of Field 1 has the value "CBC". * (1[0].1, "HbA1c") denotes that the first component of the first Instance of Field 1, which is repeated, has the value "HbA1c".