==== hybrid_information_descriptor

Defined by ARIB in <<ARIB-B10>>.

[source,xml]
----
<hybrid_information_descriptor
    format="uint4, required"
    component_tag="uint8, optional"
    module_id="uint16, optional"
    URL="string, optional"/>
----

When `component_tag` or `module_id` is present, the two must be present and `URL` cannot be used.
