【MU S19】 what is meant in the store profile

[okay1121]

        <Item ItemCat="7" ItemIndex="270" ItemLevel="0" ItemDur="255" ItemSkill="0" ItemLuck="1" ItemOption="4" ItemExel="63" ItemAncient="9" Socket1="65535" Socket2="65535" Socket3="65535" Socket4="65535" Socket5="65535" Price="3" ID="19" />
        <Item ItemCat="7" ItemIndex="282" ItemLevel="0" ItemDur="255" ItemSkill="0" ItemLuck="1" ItemOption="4" ItemExel="63" ItemAncient="9" Socket1="65535" Socket2="65535" Socket3="65535" Socket4="65535" Socket5="65535" Price="3" ID="19" />
        <Item ItemCat="7" ItemIndex="284" ItemLevel="0" ItemDur="255" ItemSkill="0" ItemLuck="1" ItemOption="4" ItemExel="63" ItemAncient="9" Socket1="65535" Socket2="65535" Socket3="65535" Socket4="65535" Socket5="65535" Price="3" ID="19" />
<Item ItemCat=“7” ItemIndex=“296” ItemLevel=“0” ItemDur=“255” ItemSkill=“0” ItemLuck=“1” ItemOption=“4” ItemExel=“63” ItemAncient=“9” Socket1=“65535” Socket2=“65535” Socket3=“65535” Socket4=“65535” Socket5=“65535” Price=“3” ID=“19” />

Price=“3” and ID=“19”
price=Price type, right? But it doesn't seem to work

ID， What does it mean