Time-related terms used in this section, such as "TimeSlice", "lifetime", 'validity" etc., are based on the Temporality Concept version 1.1. It is strongly recommended to read and understand it before reading further.
NOTAM specifications (such as the Eurocontrol OPADD) use a specific set of terms in relation with the the applicability/validity of a NOTAM at a specific moment in time. The AIXM Temporality concept uses different terms. In particular, two AIXM temporality concept terms (“active” and "valid time") have a different meaning in AIXM as compared to their traditional NOTAM meaning. The diagrams to the right identifies these terminology differences.