Meaning/Semantic question

[Karen Menz]

Hi,
  I need some help to understand the meaning/semantic of
the following script: 
 
    <owl:Class rdf:about="Class_1">
        <rdfs:subClassOf>
            <owl:Restriction>
                <owl:onProperty rdf:resource="prop_1"/>
                <owl:someValuesFrom>              
                    <owl:Restriction>
                        <owl:onProperty rdf:resource="#prop_2"/>
                        <owl:allValuesFrom rdf:resource="#Class_2"/>
                    </owl:Restriction>
                </owl:someValuesFrom>              
            </owl:Restriction>
        </rdfs:subClassOf>
   </owl:Class>

 
I also
wonder if there's any other way to simplify it.
 

Thanks in
advance,
 
Karen