Prepare 0.3.0: ICD-11 MMS integration

input/fsh/namingSystems/ICD11MMSNamingSystem.fsh

@@ -0,0 +1,63 @@
+// ============================================================
+// ICD11MMSNamingSystem.fsh
+// NamingSystem for ICD-11 MMS in the Bangladesh national context
+// Canonical authority: WHO
+// National resolver: OCL at https://tr.ocl.dghs.gov.bd
+// ============================================================
+
+Instance: icd11-mms-bd
+InstanceOf: NamingSystem
+Usage: #definition
+Title: "ICD-11 MMS NamingSystem — Bangladesh"
+Description: """
+Declares the ICD-11 Mortality and Morbidity Statistics (MMS) coding system
+as a known and supported terminology within the Bangladesh national health
+information infrastructure.
+
+Canonical system URI: http://id.who.int/icd/release/11/mms
+Canonical authority: World Health Organization (WHO)
+
+Preferred code form: short stem codes (e.g. 1A00, NC72.Z).
+Linearization URIs are not used as code identifiers in this IG.
+
+National terminology resolver (OCL):
+  https://tr.ocl.dghs.gov.bd
+
+Supported OCL operations (use `system=` parameter, not `url=`):
+  - $validate-code: https://tr.ocl.dghs.gov.bd/api/fhir/CodeSystem/$validate-code
+      ?system=http://id.who.int/icd/release/11/mms&code={code}
+  - $lookup: https://tr.ocl.dghs.gov.bd/api/fhir/CodeSystem/$lookup
+      ?system=http://id.who.int/icd/release/11/mms&code={code}
+
+$expand is not supported — known OCL limitation.
+
+Version 2025-01 is active in the national OCL instance with 36,941
+imported concepts. The OCL resolver is an internal national service;
+vendors do not interact with it directly. All vendor submissions are
+validated at the HIE boundary via the Bangladesh ICD-11 Cluster Validator
+at https://icd11.dghs.gov.bd/cluster/validate.
+"""
+
+* name = "ICD11MMSBangladesh"
+* status = #active
+* kind = #codesystem
+* date = "2025-01-01"
+* publisher = "Directorate General of Health Services (DGHS), MoHFW, Bangladesh"
+* contact.name = "DGHS Health Informatics Unit"
+* contact.telecom.system = #url
+* contact.telecom.value = "https://dghs.gov.bd"
+* jurisdiction = urn:iso:std:iso:3166#BD "Bangladesh"
+* responsible = "World Health Organization (WHO)"
+
+// Primary identifier — canonical system URI (WHO authority)
+* uniqueId[+].type = #uri
+* uniqueId[=].value = "http://id.who.int/icd/release/11/mms"
+* uniqueId[=].preferred = true
+* uniqueId[=].comment = "Canonical ICD-11 MMS system URI. Canonical authority is WHO."
+* uniqueId[=].period.start = "2025-01-01"
+
+// Secondary identifier — national OCL source locator (machine-discoverable, not canonical)
+* uniqueId[+].type = #uri
+* uniqueId[=].value = "https://tr.ocl.dghs.gov.bd/orgs/MoHFW/sources/ICD-11-MMS/"
+* uniqueId[=].preferred = false
+* uniqueId[=].comment = "National terminology resolver — Bangladesh OCL instance. Not the canonical system URI."