eBay provides the Trading API definition file on this page. I downloaded the latest XSD file (version 791).

I tried to validate my XML for AddItems api call by using java Validator class. Then I got “org.xml.sax.SAXParseException” and got the following message.

org.xml.sax.SAXParseException; systemId: file:/some/where/ebaySvc.xsd;
lineNumber: 131534; columnNumber: 54; s4s-elt-character: 
Non-whitespace characters are not allowed in schema elements 
other than 'xs:appinfo' and 'xs:documentation'. 
Saw 'Denotes if a over or under payment was recorded.'.

What is this error? The xml code around line 131534 is like following.

<xs:element name="MismatchType" type="ns:MismatchTypeCodeType" minOccurs="0" maxOccurs="1">
    Denotes if a over or under payment was recorded.