The entry points into the content of a Descriptor are the Root AML Files, as they are defined by the AML Container format (see IEC 62714-1).

A Root AML file shall be an OPC UA FX Information Model file.

A Descriptor shall have at least one Root AML file.

Root AML Files are identified by an Open Packaging Conventions relationship of type “http://schemas.automationml.org/container/relationship/RootDocument” stored in the container relationship file “_rels/.rels”.

Example: <Relationship Target=“{path-to-Root AML file}”Type=“http://schemas.automationml.org/container/relationship/RootDocument” Id=“{Id of root aml file}”/>