When accessing large amounts of data, the SAX parser is faster than the DOM parser. If you are not sure which parser to use, see About the XML parsers.
To access the XML data file using the SAX parser:
In the Data Model view, right-click the XML query that you want to use the DOM parser, and choose Data Wizard.
In the Define XML Query dialog box, click Advanced Topics.
Uncheck Validate Data source.
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