4D command DOM Parse XML SOURCE allows developers to parse XML structures to return the reference of the document. The second parameter for DOM Parse XML SOURCE is a boolean that is required if the XML structure needs to be validated. The command validates the XML structure using a DTD or XSD that is referenced in the XML structure or by using a third parameter with the command.

Example for using third parameter to validate XML structure:

$xml_Structure_Ref:=DOM Parse XML SOURCE("C:\\file.xml";True;"C:\\file.xsd")

The third parameter is not used if the XML structure is using a reference for validating in the document.

Example validating using reference in the XML structure:

$xml_Structure_Ref:=DOM Parse XML SOURCE("C:\\file.xml";True)

In the next example, Online XML validation will not give an error using the "schemaLocation" with just the file name, but 4D will give an error -9935 "The XML file is not valid or is not well-formed".

Example using just the schema file name in XML structure:

< xsi:schemaLocation="file.xsd" />

If the full path name to the schema file is used (example below), the XML structure will validate in 4D:

< xsi:schemaLocation="C:\\file.xsd" />