XML : Movielabs manifest element encoding error againts xsd

I have xml manifest file (this is a part of it)

  <?xml version="1.0" encoding="utf-8" standalone="yes"?>    <manifest:MediaManifest  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xmlns:manifest="http://www.movielabs.com/schema/manifest/v1.5/manifest"  xmlns:md="http://www.movielabs.com/schema/md/v2.4/md"  xmlns:xs="http://www.w3.org/2001/XMLSchema">    <manifest:Compatibility>      <manifest:SpecVersion>1.5</manifest:SpecVersion>      <manifest:Profile>http://www.movielabs.com/md/manifest/v1.5/manifest-v1.5.xsd</manifest:Profile>  </manifest:Compatibility>    <manifest:Inventory>      <manifest:Audio          AudioTrackID="md:audtrackid:org:blueskyfilm.com:licks1:feature.audio51.en">          <md:Type>primary</md:Type>          <md:Language>en</md:Language>          <md:TrackReference>2</md:TrackReference>          <md:Encoding>              <md:Codec>PCM</md:Codec>              <md:ChannelMapping>L,R,C,LFE,LS,RS</md:ChannelMapping>          </md:Encoding>          <md:Channels>5.1</md:Channels>          <manifest:ContainerReference>              <manifest:ContainerIdentifier>                  <md:Namespace>md</md:Namespace>                  <md:Identifier>md:apid:org:blueskyfilm.com:licks1:feature.audio51.en</md:Identifier>                  <md:Location>file://resources/Licks_FTR_1080_2398p_51en_20en.mov</md:Location>              </manifest:ContainerIdentifier>          </manifest:ContainerReference>      </manifest:Audio>      <manifest:Audio          AudioTrackID="md:audtrackid:org:blueskyfilm.com:licks1:feature.audio20.en">          <md:Type>primary</md:Type>          <md:Language>en</md:Language>          <md:Encoding>              <md:Codec>PCM</md:Codec>              <md:ChannelMapping>stereo</md:ChannelMapping>          </md:Encoding>          <md:Channels>2</md:Channels>          <md:TrackReference>3</md:TrackReference>          <manifest:ContainerReference>              <manifest:ContainerIdentifier>                  <md:Namespace>md</md:Namespace>                  <md:Identifier>md:apid:org:blueskyfilm.com:licks1:feature.audio20.en</md:Identifier>                  <md:Location>file://resources/Licks_FTR_1080_2398p_51en_20en.mov</md:Location>              </manifest:ContainerIdentifier>          </manifest:ContainerReference>      </manifest:Audio>...    

I have error on element md:encoding.

  $ xmllint --schema ~/Documents/workspace/manifest-v1.5.xsd licks_manifest.xml > report.txt  licks_manifest.xml:20: element Encoding: Schemas validity error : Element '{http://www.movielabs.com/schema/md/v2.4/md}Encoding': This element is not expected. Expected is one of ( {http://www.movielabs.com/schema/md/v2.4/md}TrackIdentifier, {http://www.movielabs.com/schema/md/v2.4/md}Private, {http://www.movielabs.com/schema/manifest/v1.5/manifest}ContainerReference ).  licks_manifest.xml:37: element Encoding: Schemas validity error : Element '{http://www.movielabs.com/schema/md/v2.4/md}Encoding': This element is not expected. Expected is one of ( {http://www.movielabs.com/schema/md/v2.4/md}Channels, {http://www.movielabs.com/schema/md/v2.4/md}TrackReference, {http://www.movielabs.com/schema/md/v2.4/md}TrackIdentifier, {http://www.movielabs.com/schema/md/v2.4/md}Private, {http://www.movielabs.com/schema/manifest/v1.5/manifest}ContainerReference ).  licks_manifest.xml fails to validate*    

schema and reference is on movielabs.com (http://movielabs.com/md/manifest/)

I'm afraid I do not understand fully well trackidentificator specification. Movie Labs still does not respond to questions, so I try here. If someone has experience and could direct me.

Thanks.