Annex A (normative) UADP Header Layouts

A.2 Message headers for periodic data with fixed layout

A.2.3 Header layout URI

The header layout URI for the fixed layout for periodic data as specified in A.2.4, A.2.5, A.2.6 and A.2.7 is
http://opcfoundation.org/UA/PubSub-Layouts/UADP-Periodic-Fixed