Effects of multivalued fields in Solr

schemaPart.xml

<!-- What an auction might look like in its original XML form: -->
<auction>
    <title>Desktop PC</title>
    <feature>
        <name>RAM</name>
        <value>16 GB</value>
    </feature>
    <feature>
        <name>CPU Frequency</name>
        <value>4.5 GHz</value>
    </feature>
</auction>

<!-- What an auction would look like as a Solr document: -->
<doc>
    <field name="title">Desktop PC</field>
    <field name="feature_name">RAM</field>
    <field name="feature_value">16 GB</field>
    <field name="feature_name">CPU Frequency</field>
    <field name="feature_value">4.5 GHz</field>
</doc>

<!-- The *effect* of multivalued field flattening: -->
<doc>
    <field name="title">Desktop PC</field>
    <field name="feature_name">RAM CPU Frequency</field>
    <field name="feature_value">16 GB 4.5 GHz</field>
</doc>