https://www.pololu.com/api/v2/specification.json
https://www.pololu.com/api/v2/specification/0J442.json
parameter_type - The basic type (boolean, string, integer, or decimal).
parameter_name - Name of the parameter (e.g. "max. continuous output current").
text_value - The value formatted for display.
boolean_value - If the type is "boolean", this stores the true/false value.
numerical_value - If the type is "integer" or "decimal", this stores the value as a number.
significant_digits - For type "decimal", the number of significant digits before and after the decimal point.
unit_name - The name of the unit, such as "MHz".
numerical_value_in_si_units - The value converted to standard SI units such as meters and seconds. This is useful for sorting or for unit conversions.
footnote - An important note that should be displayed near the specification.
product - The product corresponding to this specification.