ConstReadonlyBIN: "urn:scte:scte35:2013:bin"The event body is a base64 splice_info_section.
ReadonlyXML: "urn:scte:scte35:2013:xml"The event body is SCTE-35 XML (scte35:SpliceInfoSection).
ReadonlyXML_BIN: "urn:scte:scte35:2014:xml+bin"The event body is a base64 splice_info_section in scte35:Signal.
SCTE 214-1 MPD event schemes carrying SCTE-35.