Data with null values does not appear in the XML file, which can cause problems when exporting data.
For example, consider the following XML. Note the data for the second employee contains an email cell with no attributes. This cause the data to import incorrectly.
<Employee_Info>
<Employee Employee_Number="105">
<Name>Masashi Okamura</Name>
<Department>Design Department</Department>
<Email>masashi@design.com</Email>
<Phone>408.555.1234</Phone>
</Employee>
<Employee Employee_Number="106">
<Name>Frank Smith</Name>
<Department>Design Department</Department>
<Email></Email>
<Phone>408.555.1235</Phone>
</Employee>
</Employee_Info>
To alleviate this issue, create an empty string:
<Employee_Info>
<Employee Employee_Number="105">
<Name>Masashi Okamura</Name>
<Department>Design Department</Department>
<Email>masashi@design.com</Email>
<Phone>408.555.1234</Phone>
</Employee>
<Employee Employee_Number="106">
<Name>Frank Smith</Name>
<Department>Design Department</Department>
<Email>""</Email>
<Phone>408.555.1235</Phone>
</Employee>
</Employee_Info>