value="{{if 'sampling_date' in file and file['sampling_date'] is not None:}}{{=file['sampling_date']}}{{pass}}"
placeholder="Sampling Date (yyyy-mm-dd)"pattern="(?:19|20)[0-9]{2}-(?:(?:0[1-9]|1[0-2])-(?:0[1-9]|1[0-9]|2[0-9])|(?:(?!02)(?:0[1-9]|1[0-2])-(?:30))|(?:(?:0[13578]|1[02])-31))">