Field declarations

A field-declaration can be a:

• Wildcard
• Projection
• FhirPathFieldPath
• GroupDereference
• JoinQuery
• FetchQuery ForQuery

Wildcard

A wild card * simply means copy all fields from input to output, unaltered.

Projection

A projection follows the JSON syntax closely, it's basically a key-value pair. Except that FQL has several alternatives to acquire the value.

  fieldname ':' value