Standardize HTML handling in FHIR / CDA

[jenniferjiangkells]

Description

HTML parsing is not handled consistently in CDA parsing and FHIR.

Tasks

• Create consistent utilities for text-to-HTML conversions
• Implement standardized handling for quantity fields (string vs int)
• Add validation to ensure proper data types are used in FHIR resources

[jenniferjiangkells]

Would be great to sort out this kind of stuff

			<component>
				<section>
					<templateId root="1.2.840.114350.1.72.1.200001"/>
					<code code="51847-2" codeSystem="2.16.840.1.113883.6.1" displayName="ASSESSMENT AND PLAN"/>
					<title>Progress Notes</title>
					<text><![CDATA[<content>Summary: Test noteAnnotation test
                        
This 37 year old gentleman presented with a fever, cough and sore throat. He was diagnosed with a community acquired pneumonia, and started on co-amoxiclav. Unfortunately he developed anaphylaxis and was treated with resuscitation fluids and adrenaline but not hydrocortisone. He had refractory anaphylaxis and so was transferred to intensive care for intubation and ventilation. He then developed a "ventilation associated pneumonia", requiring meropenem. Once treated for his CAP and VAP he was stepped down to the ward. He was treated with haloperidol for a presumed 'delirium'. He improved medically, but deteriorated in terms of his psychiatric health, with depression, anxiety and paranoid schizophrenia. He was self-medicating with his own supply of Librium.
                    
He has a past medical history of asthma and COPD but not cirrhosis. 
                
He regularly takes penicillin, Ventolin and tiotropium inhalers, as well as an ACE inhibitor, beta blocker and calcium channel blocker.
            
He is allergic to all opiates, including morphine.
        
He has previously had a cholecystectomy and appendicectomy. 
    
Plan:
- Discharge planning

I reviewed the Resident's note and agree with the documented findings and plan of care.  The reason the patient is critically ill and the nature of the treatment and management provided by the teaching physician (me) to manage the critically ill patient is: as aove                                                
The patient was critically ill during the time that I saw the patient. The Critical Care Time excluding procedures was 6 minutes.Electronically signed by Georgina DEAN at 29/11/2022 09:50 GMT</content><br>NoneNoneNoneNone</br>]]></text>
				</section>
			</component>

Feel free to create sub-issues