activity-date
Planned starting date for the activity in ISO 8601 date format, e.g. "2010-10-01". For the value of the @type attribute, see http://iatistandard.org/codelists/activity_date_type
| @type | Free text describing the type of thing being referenced. |
| @iso-date | An activity milestone date in ISO 8601 date format, e.g. "2010-12-01". |
