任何人都可以描述以下工具的用途和它们之间的区别吗？
fhir净API
智能上fhir
hl7-fhir hapi-fhir dstu2-fhir hapi-fhir-android-library
dstu2-fhir ×1
hapi-fhir ×1
hapi-fhir-android-library ×1
hl7-fhir ×1