How to write DocumentReference?

[elvetian]

Hi,

I have this POST request

http://{{machineIP}}:44376/fhir/DocumentReference?&_format=json

to write some PDF content:

<DocumentReference xmlns="http://hl7.org/fhir">
	<type>
		<!-- type information -->
	</type>
	<category>
		<!-- category -->
	</category>
	<subject id="Patient/Patient-3">
		<reference value="Patient/Patient-3"/>
		<display value="TestAppointment"/>
	</subject>
	<content>
		<attachment>
			<contentType value="application/pdf"/>
			<data value="[BASE64 encoded pdf content]"/>
		</attachment>
	</content>
</DocumentReference>

How can I post this request with firely API?

[elvetian]

Here's how I did it:

var categories = new List<CodeableConcept>();
categories.Add(new CodeableConcept(system:"http://myURI/fhir/ValueSet/documentreference-class",
  code:"[some code]", display:"[some value]",  text:"[some text]"));

var docType = new CodeableConcept(system:"http://myURI/fhir/ValueSet/documentreference-type", 
  code:"[some code]", display:"[some value]",  text:"[some text]");

var attachment = new Attachment()
{
   ContentType = "application/pdf",
   Data = Encoding.ASCII.GetBytes(["BASE64 encoded pdf content"])
};
var content = new DocumentReference.ContentComponent()
{
   Attachment = attachment
};
var contents = new List<DocumentReference.ContentComponent>();
contents.Add(content);

var documentReference = new DocumentReference()
{
   Status = DocumentReferenceStatus.Current,
   Content= contents,
   Type = docType,
   Category = categories,
   Subject = new ResourceReference("Patient/Patient-XY")
};

var document = fhirClient.Create<DocumentReference>(documentReference);

[marcovisserFurore]

Or when the attachment is located on another server:

var attachment = new Attachment()
{
   ContentType = "application/pdf",
   Url = "https://some.server/pdf-123",
   Size = 20123
};

[mmikaeel]

Thank you very much for sharing. I have one question, how do categories and docType work? What are the system and URI are for in each of those? Also, categories and docType, are these mandatory fields?