Fixing this issue will open a whole can of worms.

Each package being mapped to XML should contain a package-info.java, which defines the XML namespace. That is currently not the case in archie.

that is not a huge problem, because XML is being parsed, regardless of set namespace, although the generated XML is potentially problematic.

However, if we want to set the namespace, we enter a place with tons of issues:

• RMQueryContext xpath expressions suddenly become namespaced!

• JAXB adds a namespace prefix when you set the elementFormDefault to Qualified, as it should be for OpenEHR

• when set to qualified, JAXB only does xmlns="" when a single namespace is used

• when set to unqualified, jaxb does not parse xmlns="http://schemas.openehr.org/v1"

• JAXB detects the namespace with URI "", for any Map it might encounter

• apparently we have some maps left in the AOM

  • ResourceDescriptionItem is accidentally used in XmlResourceDescription, in annotation
  • LanguageSection has a couple of maps and needs an adapter
  • archetype.otherMetaData
  • operationalTemplate.terminologyExtracts
  • operationalTemplate.componentTerminologies
  • probably more. To find: set a breakpoint in com.sun.xml.bind.v2.runtime.NameBuilder::createName, condition nsUri == null || nsUri.equalsIgnoreCase("")

• XML with a namespace will no longer parse

  • parsing without namespaces is very possible, using a XmlReader that is not namespace aware, but requires client code updating

Encountered because I wanted to use the regular XML parser for OPT default values - which did not work without elaborate tricks.