FHIR Mapping Language for JavaScript
see: https://www.hl7.org/fhir/mapping-language.html
Usage
const Engine = require('./lib/engine');
// Make 2 maps
const map1 = `map "http://test.com/1" = test1
imports "http://test.com/2"
group example(source src, target tgt) {
src.name as vn -> tgt.name as tn then {
vn.firstName as g -> tn.firstName = g;
vn.lastName as ln -> tn.familyName = ln;
};
src.address as sa -> tgt.address as ta then address(sa, ta);
}
`;
const map2 = `map "http://test.com/2" = test2
group address(source src, target tgt) {
src.street as s -> tgt.street = s;
}
`;
const maps = [ map1, map2 ];
// Create a new engine with two maps
const engine = new Engine(maps);
// Setup inputs and execute with the specified map
const inputs = [
{
name: { firstName: 'bob', lastName: 'smith' },
address: { street: '123 Main St' }
}
];
const targets = engine.execute('http://test.com', inputs); // [
// {
// name: { firstName: 'bob', familyName: 'smith' }
// address: { street: '123 Main St' }
// }
// ]Features
Very early library, currently supporting:
- copy (concrete syntax)
- literal assignment
- dependent rules
- dependent invocations
- imports with wildcards
See test/engine for examples of current functionality.