add condition to the schema

src/bdchm/schema/bdchm.yaml

@@ -174,6 +174,52 @@ classes:
           range: Participant
           description: A reference to the Participant for whom this Visit occurred.
 
+Condition:
+  is_a: Entity
+  description: >-
+    This table contains records of conditions or diagnoses recorded about a person at a certain time.
+  attributes:
+    - condition_id:
+        description: A unique identifier for each condition occurrence.
+        required: true
+        identifier: true
+    - person_id:
+        description: A foreign key identifier to the Person about whom the condition is recorded.
+        required: true
+    - condition_concept_id:
+        description: A foreign key that refers to a standard condition Concept identifier in the Standardized Vocabularies.
+        required: true
+    - condition_start_date:
+        description: The date when the instance of the condition is recorded as having started.
+        required: true
+    - condition_start_datetime:
+        description: The date and time when the instance of the condition is recorded as having started.
+    - condition_end_date:
+        description: The date when the instance of the condition is recorded as having ended.
+    - condition_end_datetime:
+        description: The date and time when the instance of the condition is recorded as having ended.
+    -  condition_type_concept_id:
+        description: A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the source data from which the condition was recorded.
+        required: true
+    - condition_status_concept_id:
+        description: A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the status of the condition.
+    - stop_reason:
+        description: The reason, if available, that the condition was no longer present.
+    - provider_id:
+        description: A foreign key to the Provider in the PROVIDER table who was responsible for determining the condition.
+    - visit_id:
+        description: A foreign key to the Visit in the VISIT_OCCURRENCE table during which the condition was determined.
+    - visit_detail_id:
+        description: A foreign key to the Visit Detail in the VISIT_DETAIL table during which the condition was determined.
+    - condition_source_value:
+        range: string
+        description: The source code for the condition as it appears in the source data.
+    - condition_source_concept_id:
+        description: A foreign key to a Condition Concept that refers to the code used in the source.
+    - condition_status_source_value:
+        range: string
+        description: The source value associated with the condition status.
+
   Organization:
     is_a: Entity
     description: >-