Request about an AddItemRequest xml file

[knit0406]

Hello,
I'm working on a quite old software in php which loads items to eBay.
I'd like to know if you can suggest or help me to improve following code.

I'd like to load other tags like colours scales.. but those tags aren't available.. or maybe it's just my fault.

Here the code generated by php :

<AddItemRequest xmlns="urn:apis:eBLBaseComponents">
<ErrorLanguage>en_US</ErrorLanguage>
<WarningLevel>High</WarningLevel>
<Item>
<ProductListingDetails>
<UPC>Non Applicabile</UPC>
<EAN>Non Applicabile</EAN>
<BrandMPN>
<Brand> XXXXXXXXXXXXX </Brand>
<MPN> XXXXXXXXXXXXX </MPN>
</BrandMPN>
</ProductListingDetails>
<BestOfferDetails>
<BestOfferEnabled>true</BestOfferEnabled>
</BestOfferDetails>
<Title> XXXXXXXXXXXXX </Title>
<Description> XXXXXXXXXXXXX </Description>
<PrimaryCategory>
<CategoryID> XXXXXXXXXXXXX </CategoryID>
</PrimaryCategory>
<Storefront>
<StoreCategoryID> XXXXXXXXXXXXX </StoreCategoryID>
</Storefront>
<StartPrice> XXXXXXXXXXXXX </StartPrice>
<ConditionID> XXXXXXXXXXXXX </ConditionID>
<CategoryMappingAllowed>true</CategoryMappingAllowed>
<SellerProfiles>
SellerProfilesType
<SellerPaymentProfile>
SellerPaymentProfileType
<PaymentProfileID> XXXXXXXXXXXXX </PaymentProfileID>
<PaymentProfileName> XXXXXXXXXXXXX </PaymentProfileName>
</SellerPaymentProfile>
<SellerReturnProfile>
SellerReturnProfileType
<ReturnProfileID> XXXXXXXXXXXXX </ReturnProfileID>
<ReturnProfileName> XXXXXXXXXXXXX </ReturnProfileName>
</SellerReturnProfile>
<SellerShippingProfile>
SellerShippingProfileType
<ShippingProfileID> XXXXXXXXXXXXX </ShippingProfileID>
<ShippingProfileName> XXXXXXXXXXXXX </ShippingProfileName>
</SellerShippingProfile>
</SellerProfiles>
<Country>IT</Country>
<Currency> XXXXXXXXXXXXX </Currency>
<DispatchTimeMax>5</DispatchTimeMax>
<ListingDuration>GTC</ListingDuration>
<ListingType>FixedPriceItem</ListingType>
<PictureDetails>
<PictureURL> XXXXXXXXXXXXX </PictureURL>
</PictureDetails>
<PostalCode> XXXXXXXXXXXXX </PostalCode>
<Quantity> XXXXXXXXXXXXX </Quantity>
<ItemSpecifics>
<NameValueList>
<Name>Brand</Name>
<Value> XXXXXXXXXXXXX </Value>
</NameValueList>
<NameValueList>
<Name>MPN</Name>
<Value> XXXXXXXXXXXXX </Value>
</NameValueList>
</ItemSpecifics>
<Site>Italy</Site>
<UUID> XXXXXXXXXXXXX </UUID>
</Item>
<RequesterCredentials>
<eBayAuthToken> XXXXXXXXXXXXX </eBayAuthToken>
</RequesterCredentials>
</AddItemRequest>

Ref. https://developer.ebay.com/devzone/xml/docs/reference/ebay/additem.html#samplebasic 

Thanks in advance