The Digital NOTAM Subscription and Request Service Request Interface shall support filtering based on the operators defined in the OGC Filter Encoding 2.0 Encoding Standard. The temporal extension (WFS-TE) shall be used to support advanced temporal filtering. As a minimum use case number 4 (Retrieve the BASELINE of a feature valid at a point in time) shall be supported. The other uses cases should be supported.
The Digital NOTAM Subscription and Request Service Subscription Interface shall allow for the selection of event scenarios of interest. These should be organised around e.g. a specific aerodrome or airspace. The considerations given in the General Principles for the Digital NOTAM will help AISP organise the event scenarios.