A powerful feature of OpenRefine is the ability to pull external data from URLs. This exercise will apply this feature to the Other_Diagnosis column of the sample dataset. Pulling in data from outside sources can be time-consuming as OpenRefine must query them, therefore we'll work with just one row.
See the next tab to learn how to parse useful bits from this data.
To parse the description of Asthma from the HTML code block retrieved in the previous exercise, a parsing expression can be used.