To produce the XML output shown, the XMLport nodes must be defined as follows:

• tableelement: The <Item> tag repeats for each record in the Item table. In AL, when a node maps directly to a database table to iterate through records, the tableelement type is required.
• fieldattribute: In the XML, No="1000" is an attribute of the Item element. The fieldattribute node type maps a table field to an XML attribute within the start tag of its parent element.
• fieldelement: The <Description> tag is a nested child element containing data from the Description field. The fieldelement type maps a table field to a dedicated XML element.

Microsoft Learn: XMLport Object. This documentation defines tableelement for table mapping, fieldelement for element-based field mapping, and fieldattribute for attribute-based field mapping. Reference Link

Microsoft Learn: XMLport Node Types. Detailed breakdown of how different node types render in the resulting XML file. Reference Link

Business Central Developer Documentation: Working with XMLports. Section on "Exporting Data" explains the mapping of Table fields to Attributes vs. Elements.