RTQName

RTQName is a data type used in XML, specifically within the context of the XML Schema language. It represents an XML Qualified Name (QName). A QName is a pair consisting of a namespace URI and a local name. The RTQName data type ensures that the value conforms to the rules of an XML QName. This means it must be a valid XML name and, if it includes a namespace prefix, that prefix must be properly mapped to a namespace URI within the XML document's scope.

The primary purpose of RTQName is to allow XML Schema to define elements and attributes whose values are themselves XML Qualified Names. This is particularly useful for scenarios where you need to reference other elements or attributes, potentially across different namespaces. For example, an XML document might define a schema for a document with a specific namespace. Within that document, an element could use RTQName to refer to another element defined in a different namespace by its qualified name.

When validating an XML document against a schema that uses RTQName, the processor checks if the provided string value can be resolved into a valid QName. This involves verifying that any namespace prefixes used are declared and correctly associated with URIs, and that the local name part adheres to XML naming conventions. The RTQName data type helps maintain the integrity and structure of XML documents by enforcing correct namespace usage for names.