Analogy to DataSet |OPC UA Standard|Forum|OPC Foundation

Hi,

I have the following data structure in my system, call it PV: 

• PvName
• DataType (Boolean , int, string, double, array (one diamentional), etc) 
• ServerTimeStamp
• Value
• Unit                   
• Size (size of data stored in the value field)
• quality
• alarm

Now I wanna create DataSet for the following structure on the PubSub communication model. I came up with the following structure: 

<Fields>
  <FieldMetaData>
     <Name>DSS:FDS_SVC:CON_FDS_SVC</Name>
     <Description>
        <Locale i:nil="true" />
        <Text>FDS SVC Client Connection</Text>
     </Description>
     <FieldFlags>0</FieldFlags>
     <BuiltInType>6</BuiltInType>
     <DataType>
        <Identifier>i=6</Identifier>
     </DataType>
     <ValueRank>-1</ValueRank>
     <ArrayDimensions />
     <MaxStringLength>0</MaxStringLength>
   <DataSetFieldId>
<String>1bc6c8dd-724d-4f39-884c-630175bf37df</String>
</DataSetFieldId>
<Properties>
   <KeyValuePair>
     <Key>
        <NamespaceIndex>0</NamespaceIndex>
        <Name>Unit</Name>
     </Key>
   <Value>
      <Value>
      <String xmlns="https://opcfoundation.org/UA/2008/02/Types.xsd" />
   </Value>
   </Value>
</KeyValuePair>
<KeyValuePair>
<Key>
<NamespaceIndex>0</NamespaceIndex>
<Name>Alarm</Name>
</Key>
<Value>
<Value>
<String xmlns="https://opcfoundation.org/UA/2008/02/Types.xsd">HH</String>
</Value>
</Value>
</KeyValuePair>
</Properties>
</FieldMetaData>
</Fields>

Now I have two questions:

1- Does the analogy created by me correct? Does it make sense? 

2- When I change the value I only receive the value on the subscriber side not the properties. Why is that? 

Thank you for your support.